TARRYTOWN - Metro-North Railroad has restored service after a computer system power problem forced it to temporarily stop trains on three of its five lines last night.

Commuters tells News 12 that trains this morning are running on time for the most part into Manhattan. Metro-North said there were15-minute delays for trains leaving Grand Central Terminal on the Hudson, Harlem and New Haven lines this morning.

A spokeswoman for the nation's second-busiest railroad says some commuters were stranded for up to two hours on the Hudson, Harlem and New Haven line trains last night while electricians worked to hook up temporary power to the computer system.

Trains were taken to the nearest stations, where riders were allowed to exit. All trains had power and heat during the two-hour interruption.

Metro-North officials say 'human error' during an electrical repair project was the cause of the computer glitch.

Metro-North serves 281,000 riders a day in New York and Connecticut. It has experienced a spate of problems in the last year, including a derailment in the Bronx that killed four passengers. AP wires were used in this report