11/04/2017 6:13 AM AEST | Updated 11/04/2017 6:45 AM AEST

Man Violently Dragged Off Plane After United Airlines Overbooks Flight

Several disturbing videos posted to social media Sunday show a man being violently dragged off a United Airlines plane out of Chicago after the company overbooked the flight.

Video posted to social media shows the man screaming as security personnel pry him out of his chair, causing his head to bash against an armrest. He's then dragged down the aisle on his back as horrified witnesses film on their phones and scream out in disgust.

"My God, what are you doing? No, this is wrong!" one woman cries as she watches the man being dragged past her feet. "Oh my God look at what you did to him! Oh my God!"

Someone else describes the man as having "busted his lip."

Audra D. Bridges, who posted a video of the encounter to Facebook, told The Courier-Journal that airline staff were looking for one volunteer to give up a seat before the flight to Louisville, Kentucky, boarded. Passengers were offered $400 and a hotel stay.

After the flight boarded, staff announced that they needed four people to volunteer to give up seats so that United employees who needed to be in Louisville Monday could take them. The amount was increased to $800, she said, and passengers were told the plane wouldn't leave until four people volunteered.

When nobody offered, staff announced a computer would select four people. One couple cooperated and left. The man in the video was also selected.

One Twitter user who also posted video of the dramatic ordeal said the airline sought four volunteers "for personnel that needed to be at work the next day."

In the videos, an upset woman is heard suggesting that the pilots rent a car and drive to Louisville instead.

In a statement, the airline apologized for the "overbook situation."

"After our team looked for volunteers, one customer refused to leave the aircraft voluntarily and law enforcement was asked to come to the gate," the airline said in a statement. "We apologize for the overbook situation. Further details on the removed customer should be directed to authorities."

Later, the company CEO released another statement on Twitter apologizing for having to "re-accommodate these customers."

The Chicago Police Department told The Huffington Post that Chicago's Department of Aviation Police handled the incident. In a statement, the Department of Aviation Police said, "The incident on United flight 3411 was not in accordance with our standard operating procedure and the actions of the aviation security officer are obviously not condoned by the Department. That officer has been placed on leave effective today pending a thorough review of the situation."

The Chicago PD also released a statement calling the man in the video "irate" and saying that he fell.

Bridges said on Facebook that the booted passenger didn't want to get off because he is a doctor who had to be at a hospital in the morning.

"He did not want to get off. We are all shaky and so disgusted," she wrote.

Another video posted to Twitter by @Tyler_Bridges appears to show the man back on the plane after he was removed. The man can be heard saying, "I have to go home." Other videos posted online showed the man clearly bleeding and disoriented on the plane.

According to The Courier-Journal, some passengers asked to get off the plane after a medical crew entered the aircraft to help the man, she said.

In response to the videos, some are vowing to never do business with the airline again. The incident also comes just two weeks after the company found itself in hot water for refusing to allow three girls to board a flight because they were wearing leggings.