A woman died early this morning in a single-vehicle accident on Memorial Circle.

The fatal crash happened at about 1:20 a.m. A vehicle was heading outbound on the Memorial Bridge when it “lost control and overturned for unknown reasons” at Memorial Circle, according to U.S. Park Police.

“One vehicle was involved and the sole occupant, an adult female died at the scene,” police said. The bridge and the circle were closed for several hours this morning for an accident investigation.