A fiery crash shut down a Stratford street on Tuesday and witnesses tell CTV News one of Justin Bieber's family members was allegedly involved.

Marty Denham was outside his shop when he heard a loud noise on Lorne Avenue West and saw one vehicle had collided with another.

"I had my back to it, I turned around, there was probably a five-count and the entire car blew up behind them," he said.

One of the vehicles was consumed by flames almost instantly.

That's when Denham saw a woman jump out of the car to safety.

"We thought we were watching a person die because we thought the girl was the passenger."

Denham said one of the people involved in the crash was Kathy Bieber, who is married to the pop star's grandfather on his dad's side of the family.

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"I was more concerned that they weren't dead, because it was like a movie," he explained.

"Thankfully everyone made it out," said Taylor Tessier, another witness to the crash. "First aid was already being done on scene."

Tessier was working across the street at the time of the collision and heard the emergency sirens from first responders.

She was amazed that no one appeared to be seriously hurt.

"Made sure everyone was OK before I even bothered taking a picture or video of it, but I'm kind of glad I got pictures and video because that was crazy," Tessier said. "It's not something you see every day."

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CTV News reached out to the Stratford Police Service on Sunday. They did not respond to our request for comment or our questions about whether any criminal charges have been laid since Tuesday.

Justin Bieber started his singing career by busking on the steps of the Avon Theatre in Stratford, and has since gone on to become one of the biggest pop stars in the world.