An employee at a nearby business, who did not wish to be named, said she had been told the more seriously injured woman had ended up trapped beneath the tractor, which was towing a trailer.
She added: “Bridge Street is still closed. A helicopter came earlier to take a woman to hospital.
“We think a car had pulled up suddenly, which caused a big tractor with a trailer to brake, so it didn’t hit the car. I was told it ended up on the footpath.”
North Yorkshire Police have been contacted for comment.