On 19 July 2011, a Royal Thai Army Sikorsky UH-60 Black Hawk helicopter crashed in these mountains, killing 9. The chopper had been sent out to recover five bodies of victims of another helicopter crash involving a Bell UH-1 Iroquois, that had occurred two days earlier while looking for illegal loggers in Kaeng Krachan National Park near the Burmese border west of Phetchaburi. The Black Hawk helicopter crashed near 978 m high Yage Taung mountain in the Tanintharyi National Park zone in Burma, close to the border with Thailand.