A 15-year-old Ann Arbor girl reported Thursday she was sexually assaulted by at least one man she knows at a Washtenaw Avenue hotel, Ann Arbor police said.

The victim was admitted to St. Joseph Mercy Hospital, where Ypsilanti police responded at 8:33 p.m. to interview her while her parents were present.

She told Ypsilanti police she "woke up" in Ypsilanti near Washtenaw Avenue and North Mansfield Street, a police incident log said.

Ann Arbor police detectives are awaiting toxicology results to determine whether the victim was given drugs, said police spokeswoman Lt. Angella Abrams.

The assault occurred sometime after 9 p.m. Wednesday at A Victory Inn and Suites hotel in the 3700 block of Washtenaw Avenue, police said.

Police are working to identify the man. So far, no arrests have been made.

Anyone with information can call the Ann Arbor Police Department's confidential tip line at (734) 794-6939.

Editor's note: Information about the location of the hotel has been corrected. Police originally provided an incorrect block number.