A woman reported Tuesday morning that she was forced to do heroin and sexually assaulted during the night at a home in the 100 block of North Summit Street, Ypsilanti police said.

The 18-year-old woman reported the assault at 11 a.m., police said. At some point, she went to St. Joseph Mercy Hospital, police Lt. Paul DeRidder said.

She told investigators that she was able to sneak out of the home Tuesday morning after being sexually assaulted by a man police have not been able to identify. DeRidder said he couldn't discuss details because of an ongoing investigation.

Anyone with information can call police at (734) 483-9510.