A speeding car crashed and exploded on a Niagara Falls bridge connecting the US and Canada Wednesday — killing the driver and his passenger in a fear-inducing incident that shut down several border crossings on one of the busiest travel days of the year.

The Bentley sedan was going up to 100 mph when it rammed into a median near the checkpoint area on the American side of the Rainbow Bridge at around 11:15 a.m. — flying several feet into the air and bursting into a fireball before landing in dozens of pieces, according to federal law enforcement sources.

The blast raised concerns of a possible terror attack on both sides of the border, but New York Gov. Kathy Hochul said later Wednesday that had been ruled out by investigators.