BRANDON, Fla. (AP) _ Bruce David Kimball, an Olympic silver medalist in diving four years ago, was charged with two counts of vehicular homicide today, after police said he ran his car into a crowd of people, killing two people and injuring six others.

Kimball, 25, posted $10,000 bond and was released from the Hillsborough County Jail where he was taken late Monday night, said sheriff's spokesman Jack Espinosa.

Espinosa said Kimball, who survived an automobile crash in 1981 and recovered from injuries to finish second in platform diving competition at the 1984 Los Angeles Games, was estimated to be traveling 70 to 90 mph when his car struck three parked cars before ramming into a group of 30 to 40 teen- agers standing on a dead-end road.

The road is a popular gathering place, and the crowd was standing in the street, Espinosa said.

The dead were identified as Kevin Gossic, 16, of Brandon, and Robbie Bidell, 19, of East Hillsborough.

Raymond Kerker, 16, of Brandon, was listed in fair condition at Tampa General Hospital after surgeons reattached a leg. One other injured person was listed in serious condition at Brandon Humana Hospital, and the others were treated and released.

A witness said she saw the car approaching but thought it would stop.

''We were just standing around talking,'' Lara Beck, 17, said. ''We saw this car just come racing down. ... He was going so fast. ... He skimmed about three cars and then he started to hit one and then another.''

Kimball, of nearby Valrico, made the U.S. Olympic team in 1984, just three years after a head-on automobile crash in Michigan left every bone in his face broken. Kimball's leg was also broken, ligaments in his knee were torn and his spleen had to be removed.

A blood-alcohol test was administered after Monday night accident, but results were not yet available.