Monday afternoon, Oscar Munoz, CEO of United Airlines, released a statement of apology after social media video footage emerged showed a man being dragged off a Chicago-to-Louisville United Express flight on Sunday.

In the footage, the man was forcibly removed from his seat and dragged by officials down the aisle. 

"This is an upsetting event to all of us here at United. I apologize for having to re-accommodate these customers," Munoz's statement said. "Our team is moving with a sense of urgency to work with the authorities and conduct our own detailed review of what happened. We are also reaching out to this passenger to talk directly to him and further address and resolve this situation."


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The following are tweets from two people on Twitter of the incident: 

The flight was overbooked, according to United Airlines, so the airline asked for volunteers to leave the aircraft.

This man said he had to get home and refused to voluntarily give up his seat and that's when we are told the police were called to remove him.

United Airlines gave us this response:

“Flight 3411 from Chicago to Louisville was overbooked. After our team looked for volunteers, one customer refused to leave the aircraft voluntarily and law enforcement was asked to come to the gate.
We apologize for the overbook situation.”

Tyler Bridges captured video of the incident and spoke with NBC NEWS Monday. He said the confrontation turned bloody after the man refused to leave and a third officer got on the plane. 

"That's pretty much where the video starts," Bridges said. "The man, he grabs him, you know.  Forcefully pulls him across and the passenger hit his head on the armrest next to him.  Knocked him out, he got all bloody on his face." You can watch the full interview Monday night on Nightly News. 

There is no word on the condition of the man removed from the plane.