An investigation was underway Tuesday in Carlsbad, where a speeding motorist ran a red light and fatally struck another driver Monday night, police said.

The fatality at Rancho Santa Fe Road and Calle Barcelona occurred shortly before 10 p.m. Monday, according to Carlsbad police Lt. Pete Pascual.

The driver of a Buick sedan ran a red light while speeding on south of Rancho Santa Fe Road and collided with the driver of red Ford Mustang in the intersection of Calle Barcelona, Pascual said in a statement.

The driver of the Mustang died after witnesses to the crash tried unsuccessfully to save him, the lieutenant said, noting the driver of the Buick sustained serious injuries and was taken by ambulance to Scripps La Jolla Hospital.

— City News Service

Chris Jennewein

Chris Jennewein is Editor & Publisher of Times of San Diego.