The land border between the U.S. and Canada has been closed after a car exploded at a checkpoint following a warning of an 'increasing terrorist threat' to New York.
Two people died in the vehicle when it erupted in an enormous explosion at the Rainbow Ridge checkpoint at Niagara Falls. A border agent has been hospitalised.
The City of Niagara Falls says the car was trying to enter the U.S. from Canada.
All four land checkpoints between the U.S. and Canada were closed after the explosion.