Pittsburgh police have opened an investigation into a woman's claim she was raped inside a PPG Paints Arena bathroom during Wednesday's playoff game between the Penguins and Capitals.

The woman filed a sexual assault report at a nearby precinct at 12:01 a.m. after attending Game 4, public safety spokeswoman Sonya Toler told the Pittsburgh Post-Gazette.

Toler said the investigation is ongoing.

"We are investigating a report of a sexual assault that reportedly occurred at the Pens Game last evening. The female victim walked in to the Zone 2 station last night at 12:01 a.m. to report the incident. Further details are not available at this time as the investigation is ongoing."

The victim told police the sexual assault occurred inside a stall in between periods but no one came to her aid, KDKA-TV in Pittsburgh reported.

The Penguins acknowledged in a joint statement with AEG, their arena management company, an incident occurred and said they are "cooperating fully" with the police investigation.