WFAA-TV

In Irving, the motorcycle rider was thrown 100 feet by the impact of the collision with an ambulance.

Two motorcyclists were killed in separate accidents in Irving and Fort Worth overnight. Police said both riders were traveling at a high rate of speed when they crashed.

In the first incident late Saturday night, a man was killed when his motorcycle collided with an Irving Fire Department ambulance.

Police spokesman Sgt. Jason Rodgers said the ambulance had just completed a call and was transporting a patient to the hospital when its driver stopped at the corner of Westbrook Drive and West 4th Street.

"Apparently they thought it was clear," Rodgers said. "[The driver] started to pull out into the intersection and the motorcycle — at a high rate of speed — caused the accident by running into the ambulance."

Jeremy Moore, 27, was thrown about 100 feet by the impact.

Moore was taken to Parkland Memorial Hospital in Dallas, where he was later pronounced dead. A relative said he leaves behind a young son.

A few hours later, another motorcyclist was found dead at the scene of an accident on Highway 287 in Fort Worth.

Police spokesman Sgt. Pedro Criado said there are no known witnesses to the accident, which apparently occurred when the driver of the lime green Kawasaki was unable to negotiate a curve at high speed and plowed into the back of a Ford Taurus parked on the shoulder of the highway.

The impact sent the back end of the unoccupied Taurus up over a guardrail. The motorcycle was lodged underneath the car.

The driver was not identified. Criado said it was not yet known if alcohol was a factor in the fatal accident.

WFAA-TV reporter Monika Diaz in Irving contributed to this story.