The Harlingen Police Department is seeking information on a potential witness to a car crash that claimed the lives of a Harlingen father and son on Sunday.

According to a news release, Harlingen PD is searching for information on the driver and passengers of a blue pickup truck, possibly a Toyota, that traveled in the same direction as the white Chevrolet truck involved in the crash before the collision.

READ ALSO: Police: 2 dead after car crash in Harlingen

Anyone with information or video that could assist in the investigation is urged to contact Investigator Raul Flores at (956) 216-5434.

Officials said the two victims involved in the crash were identified as Roel Martinez, 33, and his son Israel Martinez, 10.