At 3:39 pm Tuesday, four teens were injured after striking a parked car on Sycamore Ave near Brentwood Blvd in the City of Bentwood.
The helicopters landed at Heron Park off Garin Parkway.
According to East Contra Costa Fire Protection District Battalion Chief Jeff Burris, none of the teens were wearing their seat belt at the time of the crash. The vehicle was traveling westbound when it struck an unoccupied pickup truck.
Crews were on scene for nearly 2-hours.
No further details were available and Brentwood Police are investigating the crash.