EDIT: More recent reporting directly contradicts the Fox report below:
A preliminary investigation has found that the car did not contain explosives, according to three law enforcement officials with knowledge of the matter, who spoke on condition of anonymity to discuss an open investigation.
A law enforcement official briefed on the incident said investigators believed the explosion resulted from the impact of the collision. The car went airborne and struck a cement pillar, according to the official. A suitcase was found near the car but did not contain explosives, the official added.
The FBI is investigating a vehicle explosion Wednesday at the Rainbow Bridge border crossing between the U.S. and Canada in what sources tell Fox News was an attempted terrorist attack.
Explosives were in the vehicle at the time and two people who were in the car are dead, the sources told Fox News. A border officer was injured.
(Note: I think Fox is the only news org reporting this. And it’s Fox.)