SACRAMENTO -- Officials investigating a light rail train derailment at Marconi Avenue and Roseville Road in Sacramento, near the Haggin Oaks Golf Course.
Around 9:38 p.m. Thursday, a passenger light rail train rear-ended a stopped light rail train that was undergoing maintenance testing. Sacramento Regional Transit says this was the second accident like this in 32 years.
The incident occurred on the Blue Line between the Roseville Road and Marconi/Arcade light rail stations.
Twenty-seven people were on board, and 13 people -- including three RT employees -- were taken to the hospital. As of Friday afternoon, 12 had been released.
Light Rail riders were told to expect disruptions or delays during Friday's commute.
NTSB is sending six investigators to the derailment scene to investigate the incident.
This is a developing story.