The Rainbow Bridge connecting the U.S. and Canada at Niagara Falls, New York, has been closed after a vehicle explosion, according to the FBI and local authorities.
It appears to be an accident according to the AP article.
Speaking to WGRZ-TV, Mike Guenther said he saw a vehicle speeding toward the crossing from the U.S. side of the border when it swerved to avoid another car, crashed into a fence and exploded.