Some passengers on the Orange and Red lines experienced long waits and crowded platforms following two incidents that disrupted service during the evening commute.

A train headed to Shady Grove had a mechanical problem outside Rockville during rush hour. There was single-tracking around it, according to Dan Stessel, Metro’s chief spokesman. He said it was resolved in 15 minutes.

Metro’s Twitter feed said there was a door malfunction on the Red Line but later mentioned that a “disabled train [had been] removed from service near Rockville.”

On the Orange Line, a disabled train incident happened at Stadium-Armory around 5 p.m. Another train was needed to replace it. Stessel said the situation took 30 minutes to resolve.

Riders took to Twitter to complain about the waits and the crowds packing some of the subway stations along those two lines.

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