Twelve people have suffered slight injuries after a passenger opened an emergency exit door during a plane flight in South Korea, causing air to blast inside the cabin, officials said.

Some people on board the Asiana Airlines Airbus A321 aircraft tried to stop the person, who was able to partially open the door, the transport ministry said. The plane landed safely.

The person was detained by airport police on suspicion of violating the aviation security law, a ministry statement said. The person’s identity and motive were not immediately released.

The plane with 194 people aboard was heading to the south-eastern city of Daegu from the southern island of Jeju.

The flight normally takes about an hour, and the incident occurred when the plane was approaching the Daegu airport at an altitude of 700ft (213 metres).

The passengers included teenage athletes on their way to a track and field competition. Some screamed and cried in panic, Yonhap news agency reported, citing their coach.

Yonhap quoted other passengers as saying they suffered severe ear pain after the door opened. It said some cabin crew shouted for help from passengers to prevent the door from being opened.

Twelve people were taken to hospitals for treatment.

Emergency officials in Daegu said the injured people suffered breathing problems and other minor symptoms.