PARIS (AP) — Power problems and a stuck train interrupted rail traffic that flows through the undersea tunnel connecting the U.K. to continental Europe on Tuesday, with passenger train operator Eurostar indefinitely suspending its services to and from London during the busy end-of-year holiday period.

Eurostar blamed “overhead power supply issues in the Channel Tunnel†and what it said was a failed train operated by LeShuttle, which transports vehicle traffic by rail through the tunnel, to and from the French port of Calais and the U.K. port of Folkestone.

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