LOS ANGELES - The Latest on a wreck involving a Los Angeles County sheriff's vehicle that killed two children (all times local):

5:50 p.m.

A witness says a Los Angeles County sheriff's vehicle wasn't using its sirens or lights before it crashed with another car, jumped a curb and killed two small boys.

Julie Valle tells the Los Angeles Times that the sheriff's SUV didn't switch on its siren or lights until an instant before it hit another car, jumped the sidewalk and hit a woman and her two boys.

Video from a nearby store shows the SUV, with its emergency lights on, driving on the sidewalk.

Luis Hernandez tells the Times that the boys were his brothers, 7-year-old Jose Luis and 9-year-old Marcos. Their mother was hospitalized in critical condition.

Los Angeles police say they're investigating the crash that occurred Thursday night as the sheriff's vehicle was answering an emergency call.

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10:08 a.m.

Los Angeles police have released new information from the investigation of a fatal traffic collision involving a Los Angeles County Sheriff's Department vehicle.

A police statement Friday says the sheriff's patrol car was responding to an emergency call around 7:30 p.m. Thursday when it collided with a car in Boyle Heights.

The force of the collision caused the patrol vehicle to hit two little boys and their mother on a sidewalk. The second car struck a third vehicle, causing injuries to two adult pedestrians in a crosswalk.

One of the boys died at the scene and the other at a hospital. They were only identified as ages 7 and 9. Their mother was critically injured.

Police say that out of seven people taken to hospitals, five had relatively minor injuries, including two sheriff's deputies.

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8:05 a.m.

Two children have been killed as a result of a collision involving a Los Angeles County sheriff's patrol car and two other vehicles.

The crash occurred around 7:30 p.m. Thursday in the Boyle Heights area of Los Angeles as deputies were responding to a report of a gunshot victim.

Los Angeles Police Department Capt. Alfonso Lopez says the Sheriff's Department SUV collided with the other vehicles and then struck five pedestrians on a sidewalk at Whittier Boulevard and Indiana Street.

One child died at the scene and the other at the hospital. The conditions of the other pedestrians are not known.

No identities have been released.

News from © The Associated Press, 2017