SACRAMENTO, Calif. — Twenty-seven people were injured Thursday night when two Sacramento Regional Transit light-rail trains collided, the Sacramento Bee reports. Thirteen of those were transported to area hospitals. Two of the injuries were described as moderate, and none were considered life-threatening.

The accident occurred in North Sacramento in an isolated area near Roseville Road, about a mile from where tracks cross under Interstate 80 and enter Sacramento’s city limits.

Transit officials told a local TV station that the injuries occurred on a southbound train which collided with a test train carrying three employees. None of the employees were hurt in the crash.

It is the second collision since Sacramento’s light-rail system began operating in 1987. In 1999, 30 people were injured when a train carrying passengers collided with a disabled train.