A Potsdam man is in critical condition after being struck by a train in the town of Potsdam Sunday night.

St. Lawrence County Sheriff's deputies say they were called to an area off Sissonville Road around 10 p.m. where they found 45 year old Kevin Seig on the railroad bed near the train, which was stopped following the accident.   Seig is believed to have been taking a short-cut on the tracks to his home on Pleasant Valley Road when he was struck by the train.
  "At some point, he either passed out due to alcohol consumption or some other reason, was laying on the tracks and the train conductor and engineer attempted to stop the train, but were unsuccessful," said Detective Sergeant Brooks Bigwarfe of the sheriff's department.   Seig was taken to the Potsdam airport, where he was flown by helicopter to Upstate Medical University in Syracuse.   He suffered severe head and internal injuries and underwent surgery Monday morning.   Seig was in critical condition Monday afternoon.   Officials from train owner CSX were on the scene.   The train was released after four hours.   The cause of the accident is still being investigated.