The delays are due to mechanical difficulties, Metro-North said.
Riders should listen for announcements at their stations.
The train delays were reported as snow began to fall across Fairfield County. The entire area is under a Winter Weather Advisory with up to 2 inches of snow possible by the early evening on Tuesday.
The snow will begin to transition to sleet and freezing rain during the evening and will eventually change over to rain after midnight as temperatures climb above freezing. Ice accumulations could be up to a tenth of an inch and an additional inch of snow could fall as well overnight.
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