A 69-year-old Northwest Washington woman was seriously injured yesterday when she was struck by a car and knocked into the path of a Metrobus that crushed her legs, officials reported.

The women, identified as Mary Ann Scott of 818 Missouri Ave. NW, had to have both of her legs amputated at the Washington Hospital Center, where she was listed in serious condition late yesterday, hospital officials said.

According to police and witnesses, the woman was crossing Georgia Avenue at Kennedy Street NW when the accident occurred shortly before 2 p.m.

As she crossed the street, a car traveling south on Georgia Avenue struck her. The driver continued on.

The woman was knocked into the path of an oncoming Metrobus that was turning north on Georgia Avenue, witnesses said.

"The (bus) driver heard a thump and then a woman scream," said a Metro supervisor.

Witnesses said the woman's legs were crushed under the front left hand tire of the bus.

Homer Cogdill, a Metro supervisor, said the empty bus was driven by a mechanic who was taking the bus to Silver Spring to replace a bus that has broken down.

Traffic was tied up for nearly two hours around the busy intersections as police cordoned off the accident scene to keep a crowd that had gathered away.

Police are asking anyone with any information about the accident to call the hit-and-run office at 727-4444.