A University of Minnesota student caught a man masturbating behind her in Anderson Hall last week, according to a University police report.

The student was waiting for class to start last Monday when she saw the suspect standing about five feet away from her, the report said. She turned away from him and sat on a nearby staircase.

When the student turned around, the report said, she saw the man was standing directly behind her, staring at her and masturbating.

University police couldn’t immediately be reached for comment on this incident.

University police have received complaints about sexual behavior in West Bank buildings for more than a decade. In a July interview, Deputy Chief Chuck Miner called these complaints “an ongoing problem.”

In July, a University police officer followed a man into an Anderson Hall bathroom. After sitting in an adjacent stall and exchanging foot taps with the man, the officer heard “loud skin-on-skin rubbing noises” from the man’s stall.

Police banned the 51-year-old man from all West Bank buildings for a year.

Members of University police’s Coordinated Response Team arrested five people in separate incidents for “inappropriate activities” in Anderson Hall this March.

In 2003, a student was arrested and ticketed after police received a complaint of people engaged in sexual activity in a Willey Hall bathroom.