The accident occurred during the landing of the airliner.
In South Korea's Daegu Airport, an emergency opening of the plane's doors occurred during the landing of an airliner, Yonhap news agency reported. Due to the accident, nine people were injured and six had serious breathing problems.
As noted, the Airbus A321-231 was coming from Jeju Airport, but the emergency exit door swung open during the landing.
Fortunately, the pilots were able to successfully land the plane.
Police are currently investigating the cause of the incident on board.