South Korea’s air force apologized on Thursday for a 2021 mid-air collision involving two fighter jets, a day ​after auditors said pilots were taking selfies and filming ‌during the flight and held them responsible for the accident.

“We sincerely apologize to the public for the concern caused by the accident that occurred ​in 2021,” an air force spokesman said in a ​press briefing, adding that one of the pilots involved ⁠had been suspended from flying duties, received severe disciplinary action ​and has since left the military.

The apology followed a report released ​on Wednesday by the state Board of Audit and Inspection, which found that unplanned maneuvers for personal filming led to the collision between two F-15K ​jets during a formation flight near the city of Daegu ​in December 2021.

Auditors said a wingman pilot attempted to record images to ‌mark ⁠his final flight with the unit, sharply climbing and banking the aircraft without clearance to improve the camera angle while another pilot filmed video from the lead jet.

As the aircraft closed in, ​both crews attempted ​evasive action, ⁠but the wingman’s tail struck the lead jet’s wing, causing about 880 million won ($600,000) in damage. ​No one was injured.

The audit board held the ​wingman pilot ⁠primarily responsible, but also criticized the air force for lax controls on in-flight filming at the time, ordering the pilot to repay ⁠about ​a tenth of the repair costs.

The ​air force said it was taking steps to tighten flight safety rules and prevent ​a repeat of the incident.