Sources tell TMZ that two threatening phone calls were made from two different overseas locations.
We're told by several sources that Ryan Seacrest was escorted towards the parking garage, where he got in his Aston Martin and was allowed out of the premises. Police sources tell TMZ that a security guard on scene reported the threats, and LAPD is currently at the location.
The EMI-Capitol Music Company and the G4 Network are also occupants of the building. The structure was used as the D&D Ad Agency in "Melrose Place."
A source tells us that occupants of the building are being told that they will be kept out for at least an hour.
UPDATE: We're told that people are finally being let back inside the building.
UPDATE: E! gave TMZ this statement: We can confirm that the E! office at 5750 Wilshire received a threat today. The building was evacuated and searched under LAPD supervision. Once it was determined there was no danger, all E! employees returned to the building. All E! programming will air as scheduled.