Vehicle explosion at Rainbow Bridge closes U.S.-Canada border crossings near Niagara Falls; FBI investigating

Authorities have confirmed that four U.S.-Canada border crossings near Niagara Falls have been closed as investigators respond to a possible vehicle explosion at Rainbow Bridge, in western New York.

The FBI Buffalo Field office posted a statement on social media saying it is "investigating a vehicle explosion at Rainbow Bridge, a border crossing between the U.S. and Canada in Niagara Falls."

It added that the situation is very fluid and "that's all we can say at this time."