United Airlines is facing widespread criticism after video surfaced of a doctor being forcibly dragged off a plane by security officers on Sunday, after United overbooked the flight and then demanded some passengers disembark. The flight was leaving from Chicago O’Hare International Airport and was headed to Louisville, Kentucky. When no one volunteered to get off the flight, the 69-year-old man was selected to be forced off the plane.

He protested, saying he was a doctor who needed to see patients at a hospital in Kentucky the following morning. The Washington Post reports a fellow passenger says, “He said, more or less, ’I’m being selected because I’m Chinese.’”

Multiple Chicago Department of Aviation security officers then began dragging him through the aisle as fellow passengers screamed. After being removed, the man, who was bloodied by the first removal, attempted to run back onto the plane. He was then forcibly removed a second time. United Airlines’s CEO has apologized for “having to re-accommodate these customers.” Some people in China have begun calling for a boycott of United.