The Khmer Rouge was able to seize intact some 13 coastal patrol "Swift boats", 40 PBR Mk 1 and 2 "Bibber" river patrol boats and five LCM (8) LCUs for the Navy of the Kampuchea Liberation Army (NKLA) of Democratic Kampuchea; the other sea and river vessels were found damaged beyond economic repair, either sunk by enemy fire or scuttled by their own crews. At least seven NKLA's "Swift boats" were later lost during the Mayaguez incident in 15 May 1975, on which one of the boats was sunk by a US Air Force AC-130 gunship and the other six were either sunk or severely damaged by US Navy A-6A Intruder and A-7E Corsair II attack jets. Despite maintenance problems and spare parts' shortages, the remaining nine coastal patrol "Swift boats", the PBR river patrol boats and the LCUs were kept serviceable at Ream and Chrui Chhangwar naval bases until February 1979, when the NKLA was neutralized by the People's Army of Vietnam during the Cambodian–Vietnamese War of 1978–79.