FBI Investigating Sudden Vehicle Explosion At Northern Border

The FBI launched an investigation Wednesday into a vehicle explosion at the Rainbow Bridge border crossing between the U.S. and Canada in Niagara Falls, New York.

Footage shows black smoke rising from large flames on the bridge after the explosion, which prompted an immediate response from law enforcement ranging from the local to federal level. Authorities said the explosion involved a vehicle attempting to enter the U.S., Fox News reported.

“High level sources” reportedly said the explosion is an “attempted terrorist attack,” according to Fox News correspondent Alexis McAdams. Both men allegedly carrying out the attack died inside the vehicle once the explosives were set off, the sources told McAdams.