Multiple people were struck in New York City Tuesday after a taxi driver hit a bicyclist and drove onto a sidewalk at "great speed," witnesses told

The taxi driver, who has not been identified, struck a man riding a bicycle in midtown Manhattan. The man then flew onto the windshield of the vehicle, according to bystanders.

The cab then accelerated at high speed, jumping over the sidewalk and striking "multiple people." One woman lost part of her leg, an official at the scene told

"We were crossing right in the middle of the crosswalk -- we had the crossing signal -- and as we were crossing with other pedestrians, the cab started to pull into the crosswalk," said Jeffrey Hayes, of Long Meadow, Mass.

"The was a man riding along this way on his bicycle with a backpack and he got picked up by the cabbie and was thrown up on the hood and up on his windshield," said Hayes, who was in town visiting his daughter. 

"The cab really accelerated at a great speed. We couldn't believe it," he said. "It smashed into the barrier here. There was a woman -- maybe a few women -- that were standing there. 

"It just nailed her," Hayes said of the woman who lost her leg.’s Cristina Corbin and Sasha Bogursky contributed to this report.