Nurse!

The clinic where Joan Rivers was undergoing a throat procedure last week is under fire, because fans are blaming the staff for her death ... and are making it clear they're out for blood.

Sources connected to the Yorkville Endoscopy clinic in NYC tell us death threats have been coming in droves since Joan was rushed to the hospital last week. Some of the threats have included -- "If Joan dies, so will you," ... and ... "I hope you people die, you killed an icon."

We're told the clinic has been shutting down early on some days to send employees home -- and additional security's been hired.

As we previously reported ... the NY Health Dept is already reviewing the clinic to see if a full scale investigation is warranted.

10:00 AM PT -- A rep for Yorkville Endoscopy tells us extra security has been hired due to media and cameras outside the facility, claiming, "Security is only to ensure patient safety and privacy."

Miranda Cosgrove exaggerated her medical expenses after a tour bus accident 3 years ago -- this according to the truck driver who's being sued by Cosgrove for her injuries.

TMZ broke the story ... Cosgrove claimed she was "disfigured and disabled" in August 2011 when her bus slammed into an overturned tractor-trailer that was laying across the highway. The singer and "iCarly" star is suing the drivers of her bus and the semi.

In court docs, Cosgrove -- who suffered a broken ankle in the wreck -- claims her medical bills added up to $184,490.16.

The truck driver has filed his own docs now ... saying her medical bills were NOT calculated properly ... and he questions whether all her treatments were related to the accident.

Joan Rivers -- who made the world laugh for over 50 years with her jokes, put-downs and one-liners -- has died in NYC ... a week after her heart suddenly stopped beating during vocal cord surgery.

She was 81.

Joan's daughter Melissa Rivers took her mom off life support so she could pass comfortably in a private room.

The death has been reported to the NYC Medical Examiner's Office -- and officials tell TMZ the office will open an investigation to determine cause of death.

Melissa just issued a statement saying, "It is with great sadness that I announce the death of my mother, Joan Rivers."

"She passed peacefully at 1:17 PM surrounded by family and close friends. My son and I would like to thank the doctors, nurses and staff of Mount Sinai hospital for the amazing care they provided for my mother."

"Cooper and I have found ourselves humbled by the outpouring of love, support and prayers we have received from around the world. They have been heard and appreciated."

"My mother's greatest joy in life was to make people laugh. Although that is difficult to do right now, I know her final wish would be that we return to laughing soon."

Rivers is widely credited for opening doors for countless female comediennes. She broke through in a big way during her appearances on "The Tonight Show" with Johnny Carson.

She also famously enraged Carson by accepting a gig to host a competing late night show on FOX. Carson never spoke to her again.

Rivers was born in 1933 -- she worked as a writer and fashion consultant before entering show biz as a stand-up comic in the early '60s. She was famously self-deprecating ... often self-critical of her looks and her marriage to Edgar Rosenberg ... who committed suicide in 1987.

Joan's late '80s FOX show tanked, which somewhat derailed her career. It was resurrected in a big way in 2010 in the wake of the documentary "Joan Rivers: A Piece of Work."

She was universally adored by fellow comedians, including fellow legend Don Rickles, who once said about her ... "Joan is not only a very intelligent lady, but extremely masterful at comedy timing. Sharing the stage with her has always been a joy for me."

Barbara Walters was asked about Joan last year, saying ... "I wouldn't dare to try to be funny about Joan Rivers because she is the smartest, best-informed and funniest woman I know."

Joan and her daughter Melissa began working as a team hosting various red carpet and fashion shows on E! and other networks, including "Fashion Police."

Joan's credits could fill a book ... including appearances in "The Muppets Take Manhattan," "The Carol Burnett Show," "Hollywood Squares," "Pee Wee's Playhouse," "Celebrity Apprentice," "Saturday Night Live" ... and on and on.

The clinic where Joan Rivers suffered respiratory and cardiac arrest is now in the cross hairs of NY health officials -- TMZ has learned they're "reviewing" the case.

Sources tell us the state's Dept. of Health has contacted the clinic -- Yorkville Endoscopy -- twice since last Thursday ... when Rivers was getting an outpatient procedure to repair her vocal cords.

State health officials tell TMZ they are "reviewing the matter" ... but have NOT launched an official investigation. We're told the review could take weeks or even months. At this point, officials are only looking at the clinic as a whole -- not specifically the doctor who performed the procedure.

As we reported ... Rivers has been moved out of ICU and into a private room at Mount Sinai hospital. It's unclear whether she's still on life support.

Singer Blu Cantrell went running through the streets, ranting about people trying to kill her last night ... until police took her into custody for psychological evaluation ... TMZ has learned.

Cantrell went seemingly berserk in a Santa Monica neighborhood around 2 AM on Wednesday. Witnesses tell us she was screaming about someone giving her "poisonous gas." The episode went on long enough that someone called police.

We're told when officers arrived, Blu -- famous for her 2001 hit "Hit 'Em Up Style (Oops!)" -- played the "do you know who I am card" ... but also referred to herself as a "one hit wonder."

Law enforcement sources tell us cops took Blu to a nearby hospital where doctors checked her out. We're attempting to reach a rep to get an update on Blu's condition, but so far ... no luck.

Story developing ...

Justin Bieber's homecoming trip to Canada hit another snag ... in addition to being arrested, he had to hit up a local hospital Wednesday for a wrist injury ... TMZ has learned.

We're told Bieber went to the Stratford General Hospital in Ontario to have his wrist checked out. According to our sources, it turns out he suffered a sprain.

As TMZ previously reported, Bieber was arrested Friday for assault and driving dangerously following an accident between Bieber's ATV and a pap in a minivan.

"Versace" rappers Migos got into an all-out battle royale at one of their shows ... where all 3 members of the group ended up going loco on their fans.

The melee started Sunday night at LimeLight nightclub in Nashville -- when according to sources ... one member of the group had a gold chain snatched from his neck while on stage, and immediately went after it in the crowd.

It's pretty wild fight video -- bodies pile up on the floor as the whole thing plays out.

Police were called, but LimeLight security was eventually able to contain things and no arrests were made.

Of course, this isn't the first time the Migos have been involved in an attack on tour ... having nearly escaped death following a drive-by shooting in Miami earlier this year.

Migos definitely love a good "Fight Night."

Joan Rivers has been moved out of intensive care -- but that does not necessarily mean her health has improved greatly.

Melissa Rivers just released a very guarded update about her mother, saying ... "My mother has been moved out of intensive care and into a private room where she is being kept comfortable."

It's not a great sign that she's been moved to a private room from intensive care -- where she would be more closely monitored by doctors and nurses.

As TMZ first reported ... Joan has been on life support since being rushed to Mount Sinai hospital in NYC last Thursday.

We don't know if she's still on life support.

A contestant on the TV show, "Utopia" was forced to leave the show temporarily for a medical emergency ... after discovering the fledgling new civilization didn't include a hospital ... or doctors.

A rep for the show tells TMZ ... 25-year-old Hex was suffering from dehydration and had to be taken to a hospital Saturday for "precautionary measures."

Sources close to production say paramedics took Hex by ambulance to Henry Mayo Hospital in Valencia at about 9 A.M. She was treated for about 5 hours ... but then returned to the "Utopia" compound to continue shooting.

Suge Knight's torso looks like a piece of Swiss cheese -- riddled with 5 bullet holes, plus another in his arm -- and these photos of the damage make you wonder how in the world he survived.

In the pics, obtained by TMZ, some of Suge's wounds are still packed with gauze ... after the shooting nine days ago at a pre-VMA party hosted by Chris Brown.

You can also see the massive scar down the middle of his gut-- sources tell us doctors had to slice his torso open to make sure the bullets did not hit any major organs. Amazingly, they did not.

One crazy detail -- the bullet hole in Suge's arm is inches away from his ink honoring Tupac. One cool detail -- docs stapled him up so well, his tatt of a vintage whip almost looks untouched.

Cesar Millan is under attack from a former employee who claims she was steamrolled by a runaway llama while on the job.

Adriana Barnes -- who was director of Cesar's dog rehab facility -- says the "Dog Whisperer" worked with many kinds of animals, but untrained employees let them run wild ... according to a lawsuit she recently filed in L.A. County.

Barnes claims the "Dog Whisperer" forced her to work 12-hour days with no lunch or bathroom breaks, and since most of the other employees were inexperienced ... the bulk of the work fell on her shoulders.

In the suit, she claims things got so bad that she was bitten 5-6 times by dogs and on one occasion she "was trampled by a llama."

According to the docs, obtained by TMZ, Cesar fired her when she confronted him about the work conditions.

Barnes says in the suit ... the stress of getting canned caused her to overdose on anti-anxiety pills, landing her on life support for 3 days.

Kid Cudi was signing an autograph for a fan during his show in Chicago on Saturday night when he passed out and was carried away by several security guards.

Cudi was performing at the North Coast Music Festival and the video shows him clearly covered in sweat. He appeared fine one moment ... and was laying on the floor the next.

Joan Rivers is on life support ... and sources close to the legendary comedian tell TMZ she is completely reliant on machines to stay alive.

According to our sources, the family will have to decide in the next couple of days whether to keep the 81-year-old on life support. We're told the family remains hopeful that if they do decide to turn off the machines, she will make a turn for the better and fight through it.

"Hercules" director Brett Ratner is being sued by a woman who went to an after party at his Beverly Hills mansion ... and left with a bloodied leg and a sliced Achilles tendon.

Lauryn Flynn -- a celeb stylist who says she's worked with Kate Bosworth, Eva Mendes and Kristen Stewart -- was at the party Brett threw July 24 after the Hercules premiere. She says she was asked to take off her shoes as she entered the home.

During the party, Flynn says she decided to go downstairs into the basement where a DJ was spinning for 100-200 people. According to the docs, obtained by TMZ, Flynn says someone decided to start dancing on a small glass table. You know what happened next.

Flynn says the table shattered, launching glass shards "like bullets across the room." She says she looked down and saw a pool of blood around her feet ... she realized her Achilles tendon had been cut.

In the docs, Flynn says she thinks a decision was made to NOT call 911 because it would cause bad publicity for Brett. Instead she went to the hospital in an Uber. She says she had to get 87 stitches.

Flynn says a friend told her later that Brett had said, "People get hurt here all the time. Just clean it up."

David Beckham didn't walk away clean from that motorcycle accident after all -- we just saw him at LAX with his hand in a cast.

Becks held up his damaged right mitt as he walked into the terminal with his kids, and photogs asked how he was feeling after laying down his bike on Sunset Boulevard yesterday.

We broke the story ... Beckham was leaving a tattoo parlor when he swerved to avoid paparazzi, according to our Becks sources -- which explains why he didn't feel like saying much to paps about his cast.

Joan Rivers remains in serious condition but is receiving the best treatment possible ... so says her daughter, Melissa Rivers.

Melissa just released a statement thanking everyone for their support ... adding that Joan would be touched.

TMZ broke the story ... Joan was rushed to Mount Sinai hospital in NYC Thursday morning after she stopped breathing during a procedure on her vocal cords.

After originally being listed in critical condition ... she's been "resting comfortably" and surrounded by family since late Thursday afternoon, according to her daughter.