A tour bus accident Sunday in the U.S. state of New York has left two people dead and 35 injured. There were 37 passengers on the bus at the time of the accident.

A New York State Police spokesman said investigators are not sure of the cause of the accident, but speculate a tire blowout might have caused the wreck. The accident occurred about 90 kilometers southeast of Rochester, New York.

The bus left Washington Sunday morning enroute to the tourist destination of Niagara Falls, New York, along the Canadian border.