BOULDER COUNTY, Colo. (KDVR) — Both directions of Highway 93 were shut down due to a crash involving four vehicles, the Boulder Police Department said in a tweet Tuesday morning.

The crash happened at Broadway and Greenbriar (Broadway is CO93) and police said there are serious injuries.

BPD said Colorado State Patrol is investigating the crash and Boulder Fire Department, Mountain View Fire Rescue and Boulder Sheriff’s Office were working on the scene.

The Colorado Department of Transportation reopened the highway around 12:45 p.m. after it was shut down for a few hours between Chambers Drive and Marshall Road.