The plane crashed just six minutes into its flight. No civilians were reported dead or injured. A South Korean navy plane crashed in the southeastern city of Pohang on Thursday, killing all four crew members on board, according to local media. The navy said the cause of the crash was under investigation.

The incident happened in Pohang, where locals said that an unidentified aircraft fell onto a hill and caused a fire.

A South Korean navy plane crashed during a training flight on Thursday, with the fates of four people on board unknown, military officials said. The P-3C patrol plane left its base in the southeastern coastal city of Pohang at 1.43 p.m. local time, but later crashed due to unknown reasons, the navy said.