U.S. Kadena Air Base showed local media Wednesday the two F-15 fighter jets that clipped each other in midair Monday afternoon off Okinawa.

One of the two U.S. Air Force jets in the accident had damage to its left wing and left horizontal tail unit. A 50-cm crack was also found on the fuselage, according to the Okinawan base's press office.

On the other F-15, the top portions of its two vertical tail fins were chipped off.

The press office said the accident was caused by contact between the two planes and was not due to mechanical problems. The office also said the U.S. military plans to resume flights of its F-15s at the base as it is necessary to maintain pilots' skills.