A four-car Metro train derailed in the New Carrollton rail yard Monday evening, damaging the track signaling equipment.

The rear car, a Rohr 1000 series model, derailed off the track around 6:25 p.m. at the Orange Line rail yard as the train was pulling out of the shop into the yard, said Metro spokeswoman Cathy Asato.

No passengers were aboard the train, which was not in service. No one was injured and the incident does not appear to have damaged the rail cars, Asato said.

However, the signaling equipment on the track was damaged, she said. Crews had begun to repair it Tuesday.

The two operators on the train were placed on paid administrative leave and underwent drug and alcohol tests, as is standard after any incident, she said. The agency also notified its outside safety monitor, the Tri-State Oversight Committee, she said.