A female UCLA student reported spotting a naked man masturbating in the open as she parked her car in a Westwood neighborhood near campus late Tuesday night, prompting school police to open an investigation.

The student told officers she was parking her car on Kelton Avenue near Levering Avenue about 10:20 p.m. when she saw the man fondling himself in a walkway between homes at 553 and 555 Kelton Avenue, according to the UCLA Police Department.

When officers arrived, she told them the nude man had run off toward the rear of the homes.

No one was hurt. Police issued an indecent exposure crime alert.

The man was described as about 20 years old, 5 feet 10 inches tall and weighing 180 pounds with an unspecified tattoo on his chest.

Anyone with information was asked to call the UCPD at 310-825-1491.