Taylor Swift's Obsessed Fan Arrested for Felony Stalking

11:41 AM PT -- Beverly Hills PD filed for and was granted a temporary firearms restraining order against Taylor's alleged stalker, Julius Sandrock, in which they claim his car was found to contain an empty gun holster, live rounds of ammunition, latex gloves, black gloves, a knife and multiple types of masks, black rope, Rx medication, and psychologist paperwork. Cops also say Sandrock was arrested attempting to break into Taylor's home while wearing a mask and rubber gloves. They claim he told officers he suffers from OCD, bipolar disorder, severe depression and manic episodes. Sandrock is on probation in Colorado for "disorderly conduct and discharging a firearm," according to police.

Taylor Swift's home, a designated historic landmark, keeps attracting bizarre behavior -- another obsessed fan was arrested there after trekking across several states ... TMZ has learned.

Law enforcement sources tell us cops were called to Taylor's Bev Hills mansion Saturday after security spotted a suspicious man in front of the property. Police responded and busted a 38-year-old man who said he'd driven from Colorado to meet with Taylor. We're told she was not home.

After searching the man's car and interviewing him, officers determined they had enough reason to arrest him and book him for felony stalking. He's still in custody, and we're told cops are in the process of issuing an emergency protective order for him to stay away from Taylor.

Taylor's security was already on high alert -- as we reported, a trespasser was recently sentenced to 3 days in jail and 3 years probation after he attempted to scale a wall at Taylor's home.