WASHINGTON (AP) - Metro says three workers have been disciplined after an incident in which an extra-long 10-car train rode through the transit system.

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Station platforms cannot accommodate more than eight cars. Dan Stessel, Metro's chief spokesman, says the train left the Shady Grove yard on the afternoon of Dec. 2 and serviced stations on the red line.

He says no passengers were in the rear two cars and no injuries were reported.

Stessel says the three employees disciplined were a terminal supervisor, a train operator and an interlocking operator, who allows train out of the rail yard. He says the disciplinary actions included unpaid suspensions and disqualifications from certain positions.