Authorities say a woman wearing only a white sheet is in the hospital after being struck by a pickup truck in Broward County, Fla.

The woman was critically injured early Thursday morning when she was hit while walking along a major street in Miramar. She was rushed to the hospital with life threatening injuries.

Police say they have no idea who the woman is. She was not carrying any identification.

The driver of the truck is cooperating with investigators.

The woman is described as being in her early to mid 30s, about 5 feet tall, 175 pounds with a black short Afro and brown eyes.