Update 4:27 a.m. Aug. 23: The Sacramento Regional Transit train collided with a maintenance train, The Sacramento Bee reported. Officials said 27 people were injured and 13 were taken to area hospitals, the newspaper reported.
It is the second collision to occur between two trains in Sacramento since the light-rail train service began in 1987, according to the Bee.
According to KOVR, officials are calling the crash a "multi-casualty" incident. Sacramento Metro Fire spokesman Chris Vestal said there were multiple injuries and "multiple medics" were at the scene, the television station reported.
Officials with the Sacramento Fire Department said the crash occurred around 9:45 p.m., KCRA reported.
At least five cars were on the tracks when the train derailed, according to the Sacramento Bee. Fire officials reported 22 injuries, the newspaper reported. Two had moderate injuries, and 20 were describe as "walking wounded," according to the Bee.