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University of California- Los Angeles police on Wednesday arrested a man suspected of sexually assaulting a woman on campus.

Babak Rahimzadeh, 54, is accused of grabbing the victim and sexually battering her last Friday near the third-floor restroom of the Public Affairs Building, according to the UCLA Police Department.

Officers identified Rahimzadeh as a suspect Wednesday afternoon.

Authorities tracked him to a home in Santa Monica and were able to convince Rahimzadeh over the phone to turn himself in, according to police.

"He seemed out of place, just kind of acting weird, acting like he belonged," said Juan Matute, a UCLA staff member. "I confronted him, asked him why he was there and he said he was a professor. I didn't believe him and I asked to see his identification."

Rahimzadeh then left the room and allegedly approached a woman down the hall, according to officials. The woman reported that he had approached her under the guise of asking for directions.

"A staff member responded to give him directions, turned away, he followed her and then grabbed her as she walked away," said Lt. Mark Littlestone with the UCLA Police Department.

Officers recognized Rahimzadeh from a separate incident last year, according to Littlestone.

"He was again contacted by us for acting suspiciously, was warned of that behavior and then let go at that time," said Littlestone. "Because we now had a name for that person, we were able to get another picture, and confirm that with the victim who was grabbed, and identify that yes, that was the person."

Rahimzadeh is described as Middle Eastern man with brown hair who is 5'8 tall and weighs around 185 pounds.

"When I have night classes that's scary because I don't get out until after dark" said Renee Wright, a UCLA student.

Rahimzadeh is being held on a $25,000 bail and was booked into Men's Central Jail, according to police.

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