There’s no indication that a vehicle crash and explosion Wednesday that killed two people on the American side of the Rainbow Bridge — which connects Ontario and New York — is linked to terrorism, says New York Gov. Kathy Hochul.

“Based on what we know at this moment, there is no sign of terrorist activity in this crash,” Hochul said at a news conference.

She said an individual from Western New York was “involved” in a “crash,” but she did not clarify if the person was the driver. She said events began at 11:27 a.m. ET.

“We’re going to ensure the public is safe before they go back on the Rainbow Bridge.”

The explosion led to the closure of four area bridge border crossings ahead of the U.S. Thanksgiving weekend. Information about the second person who died also wasn’t available.

Shortly after 5 p.m., Ontario Provincial Police (OPP) said the Peace, Queenston-Lewiston and Whirlpool Rapids bridges had reopened. The Rainbow Bridge remained closed.

“Naturally, at a time of heightened alert, everybody springs into action.” Hochul said. “We’re not aware of any threats to this area, but I state the caveat that the investigation is ongoing.”

Canadian government sources told CBC News on Wednesday afternoon that answers about what happened may take some time as the vehicle involved was badly burned. Ottawa is “highly confident” the car originated in the United States, they said.

Vehicle basically ‘incinerated’

Hochul said a video shows how the vehicle basically “incinerated” and nothing was left but the engine.

“It’s going to take a lot of time for our federal law enforcement partners … to be able to piece together the real story.”

Earlier Wednesday, the Federal Bureau of Investigation (FBI) Buffalo Field Office said on social media platform X, formerly known as Twitter, that it was investigating a vehicle explosion.

“The FBI is coordinating with our local, state and federal law enforcement partners in this investigation. As this situation is very fluid, that’s all we can say at this time.”

The Buffalo Niagara International airport said on X that it was open and “fully operational.”

PMO in contact with U.S. officials

The Rainbow Bridge connects the tourism sectors of Niagara Falls, Ont., and Niagara Falls, N.Y. It has 16 car inspection lanes into the U.S. and 15 into Canada. The Niagara Falls Bridge Commission website, which oversees the three bridges, says they see about seven million passages annually.

Justin Trudeau’s press secretary, Jenna Ghassabeh, said in an email shortly after the explosion that the prime minister was briefed “by the national security and intelligence adviser about the situation in Niagara Falls.”

The email said the Prime Minister’s Office is “in contact with the U.S officials. The minister of public safety, RCMP and CBSA are fully engaged and providing all necessary support.”

Trudeau, speaking in the House of Commons, called it “a very serious situation” and said his office would “remain engaged” on the incident the rest of the day.

Government sources told CBC on Wednesday afternoon there was no firm conclusion on whether the explosion was intentional. Because it was at a site of critical infrastructure, the operating assumption from government is there is a security threat until proven otherwise, they added.

A spokesperson from Niagara Falls Memorial Medical Center confirmed a border patrol agent was evaluated and released, after being treated with non-life-threatening injuries from the explosion.

As word of the explosion emerged, the Canada Border Services Agency (CBSA) told CBC Hamilton via email that it  was “liaising with our U.S. counterparts on this matter,” and the FBI was leading the investigation.

The U.S. transportation agency, the Niagara Frontier Transportation Authority, said it was “increasing security system-wide.”

Security was also stepped up at other Canadian border crossings.

The Detroit-Windsor Tunnel said it was operating at a “heightened level of security” in wake of the explosion at the Rainbow Bridge. In a statement, the tunnel’s chief executive officer said the crossing is open but some delays are expected. As of 3:40 p.m., delays are less than 15 minutes. Officials are monitoring the situation at other Windsor-Detroit border crossings as well.

In northwestern Ontario, border crossings remain open. The CBSA online listings for the Fort Frances Bridge between Fort Frances, Ont., and International Falls, Minn., show no delays, and a U.S. border agent at the Pigeon River crossing near Thunder Bay confirmed the crossing remains open. The CBSA also lists the bridge crossing between Sault Ste. Marie, Ont., and Sault Ste. Marie, Mich., as open as well.

The Niagara Regional Police Service wrote on X there was “no known threat on the Canadian side” of the border. The service added the public should expect to see more police out, as well as road closures near the bridges and “significant traffic congestion on Niagara roadways, including highways.”

Also on X, Toronto police wrote that while they are unaware of any threats to the city, they would be increasing officer patrols “out of an abundance of caution.” .

‘One city divided by a border’

Jim Diodati, the mayor of Niagara Falls, Ont., told CBC Hamilton he was getting out of a dentist appointment around lunch time when he learned about the explosion.

“As soon as I saw [the] border closed, the hair on my back stands up,” Diodati told CBC.

“We often say Niagara Falls is one city divided by a border.”

If you can imagine, the bridge was packed with cars that had to turn around and be sent back to Canada. It was nerve-racking.”– Forrest Willett, Ontario resident

As a border town, he said, the crossings are important to Niagara Falls. They facilitate trade and tourism, and many locals have loved ones on the American side.

“It’s cause for alarm,” he said, especially given people tend to cross this time of year for the U.S. Thanksgiving holiday and Black Friday shopping.

Diodati said there was a lot of speculation, but local officials are working with Canadian and American federal authorities.

In a situation such as this, the mayor said officials prepare for the worst and hope for the best. He said he has also heard from Canadian authorities that the car that exploded was an American car, coming from the U.S. side, and had been travelling at a fast speed.

Witness accounts

Ontario real estate agent Forrest Willett was waiting to cross into the U.S. over the Peace Bridge for work on Wednesday when border officers began approaching cars.

He said an officer told him they were evacuating the bridge as there had been an explosion at the nearby Rainbow Bridge.

WATCH | Canadian shopper describes reaching border crossing 

Canadian shopper describes reaching border crossing right after explosion

5 hours ago

Duration1:01

Alex Moran and his girlfriend reached the Rainbow Bridge just after the explosion. He describes the experience of being caught up in the violent incident and the subsequent border crossing closures.

Willett said he felt like the “elevator floor” had dropped out from under him and he was counting down the seconds until he could get off the bridge.

“If you can imagine, the bridge was packed with cars that had to turn around and be sent back to Canada,” Willett said. “It was nerve-racking.”

He said the officers directed traffic and all personal vehicles drove off the bridge within 20 minutes. They’re now crammed on streets and parking lots and people wait for the bridge to reopen, he said mid-afternoon.

Jose Ventura Jr. was visiting Niagara Falls, N.Y., with his family on Wednesday. They had just stopped at a nearby park and were heading toward the Rainbow Bridge when they heard a loud bang and saw thick smoke.

He told CBC Hamilton his 10-year-old daughter was “really scared and screaming out.”

Moments later, he said, police began evacuating everyone from the area.

“We just had to get out of there,” Ventura said. “We were worried something else might occur and for sure didn’t feel safe.”