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DENVER — A broken rail had passengers taking bus shuttles on RTD’s B Line on Friday. The broken rail was repaired and service was restored around 3:30 p.m.

The B Line light rail line runs between Denver’s Union Station and Westminster Station.

Passengers had to take bus shuttles between stations from around 9:30 a.m. until the repairs were complete.

It is unknown what lead to the broken rail.

The B Line opened in July.