A tour bus crash has killed 13 people and critically injured another six in New York.

The Worldwide Tour bus flipped on its side and skidded into a signpost on Interstate 95 at about 5.30am. The post sheared through the top of the bus along the window line, nearly two-thirds the length of the vehicle.

In addition to the killed and critically injured passengers, 11 others suffered minor injuries. The bus was said to be carrying 31 to 33 people.