A vehicle explosion on the Rainbow Bridge in Niagara Falls has resulted in the closure of all four bridges between the United States and Canada. The incident, which occurred on Wednesday morning, claimed the lives of two individuals, according to a federal law enforcement source. The cause of the explosion is currently under investigation by the FBI's field office in Buffalo.

Law enforcement officials have blocked off the entrance to the Rainbow Bridge, and fire damage is visible in the customs plaza structure. Photos show the debris field and the aftermath of the explosion. The customs plaza at the bridge is closed, causing significant disruption to travel between the two countries.

The Rainbow Bridge is a vital border crossing connecting Niagara Falls in Ontario, Canada, with Niagara Falls, New York. It is used by numerous tourists and commuters daily. Prime Minister Justin Trudeau addressed the situation during questioning in Ottawa, expressing concern over the incident at the border.

As the investigation unfolds, authorities will work to determine the cause of the explosion and assess the impact it will have on travel and security at the border crossing.