According to Ontario police, a 2005 Nissan Sentra was traveling southbound on Haven Avenue, when it ran a red light. The car lost control and hit a wall along the west side of Haven Avenue, coming to rest in the rear yard of a house.
The incident happened at about 1:41 a.m. on Haven Avenue, south of Creekside Drive.
Four people inside the Nissan were pronounced dead at the scene. Another occupant was transported to an area hospital but was later pronounced dead. The identities of the crash victims were not released, pending family notification.
The accident is still under investigation. If you have any information about the incident, you're urged to contact the Ontario Police Department's Traffic Division at (909) 395-2902.