An unidentified man was killed Sunday morning when he was struck by a Montauk-bound train at the Long Island Rail Road station in Copiague, officials said.

LIRR spokesman Aaron Donovan said the train was the 10:10 a.m. from Jamaica, Queens, that was due in Montauk at 12:53 p.m. He said a train crew member reported striking a man east of the Copiague station.

"It happened about 21/2 car lengths east of the platform -- close to the station," Donovan said. He said he did not know if the man jumped, fell or was pushed.

Donovan said the train sat in the station for two hours and 10 minutes before continuing to Montauk. He said he expected no other delays or service suspensions but that could change depending on developments in the investigation.

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"As the police investigation continues there possibly would be a service impact," Donovan said.

Donovan said "It would take at least 12 to 24 hours" to determine the cause of the fatality and release the man's identity.