Campus police are investigating yet another sexual assault at a California State University San Marcos’ residence hall, the third such on-campus rape there this school year.

Police issued a bulletin Friday afternoon advising students and staff to take precautions. A woman reported being attacked at the UVA Residence Hall at 305 Campus View Drive. The sexual assault occurred sometime between Halloween night and the early morning of Nov. 1.

The suspect is not a student at Cal State; he’s believed to live in San Bernadino County. He’s described as white, 20 or 21 years old, 5 feet 9 inches tall, and 130 pounds, with short brown hair and green eyes.

In September, two women reported being raped at the QUAD Residence Hall. A woman reported being attacked sometime between the night of Sept. 12 and the morning of Sept. 14.

Another woman there said she was attacked sometime between Sept. 18 and Sept. 19 during a dorm party.

Anyone with information is asked to call University Police at 760-750-4567 or the school’s SAFE hotline at 760-750-SAFE. Anonymous tips can be made to Crime Stoppers at 888-580-8477.