The rapper known as “Big Sean” is facing charges in upstate New York after a woman complained that she was sexually assaulted during a concert.

State Park Police charged the 23-year-old Detroit man, whose full name is Sean Anderson, with misdemeanor counts of forcible touching, unlawful imprisonment and sex abuse. A second Detroit man, Willie Hansbro, faces the same charges.

Police got the complaint about 9:50 p.m. Thursday at Artpark State Park, where Anderson was performing with Wiz Khalifa.

Authorities refused to detail what happened.

Both men were issued appearance tickets and released on $500 bail. They’re scheduled in Niagara County Court in the town of Lewiston on Sept. 6.

Neither Anderson’s press person nor record company responded to requests for comment Friday. A phone listing for Hansbro wasn’t available.

—Copyright 2011 Associated Press