GROTON — Amtrak officials say a tree came in contact with a power system, sparking a fire near Groton, Connecticut, delaying three trains scheduled to pass through.

An Acela Express train bound from Boston and headed to New York City and Washington D.C. stopped near Westerly, Rhode Island, around 2:30 p.m. Sunday.

Amtrak spokesman Marc Magliari says a tree came into contact with the overhead power system and caused a fire. It's unclear what caused the tree to hit the overhead wire. The power was turned off, leaving passengers in a stationary train for about an hour.

Magliari says two other trains were delayed, but didn't say where they were stopped. One was coming from Boston and another from New York.

Magliari says services on the train have resumed.