Updated

A 3-year-old girl has died after being pinned under an automatic garage door at a home in eastern Maryland.

Charles County sheriff's spokeswoman Diane Richardson tells The Washington Post that the girl slipped out of the house and into the garage just before 4 p.m. Friday.

Authorities believe she may have pushed the garage door's control button and tried to run out of the garage. Richardson said the door apparently struck the girl's back and pinned her.

An adult in the house heard the door and checked within minutes. A preliminary investigation indicates the girl may have died of asphyxiation. An autopsy is scheduled. Walforf is located about 30 miles southeast of Washington, D.C., on the east side of the Potomac River.