A woman reported being raped at a campus fraternity over Spring Jam weekend.

An unknown person found the woman acting “hysterically” and sitting on the sidewalk across the street from the University of Minnesota Armory just after 1 a.m. Sunday, University police Deputy Chief Chuck Miner said.

The stranger waved down an ambulance passing by, and the woman told the paramedics what happened, Miner said.

She reported it as a rape, according to the University police crime log.

Minneapolis police took a report at the scene, Miner said.

The woman refused medical attention, and Miner said she didn’t want to press any charges.

The fraternity where she was allegedly raped is unknown.