The Super Huey chopper crashed near Loreto town in southern Agusan del Sur province and efforts were underway to locate the air force personnel aboard who were deployed to help provide humanitarian assistance to provinces affected by the typhoon, the military's Eastern Mindanao Command said in a statement,NDTV reported.
Military officials didn't immediately provide other details about the crash, including the condition of the five air force personnel aboard and what could have caused the crash.
Kalmaegi was last spotted over the coastal waters of Jordan town in the central province of Guimaras with sustained winds of 130 kph (81 mph) and gusts of up to 180 kph (112 mph). It was forecast to blow away into the South China Sea late Tuesday or early Wednesday after hitting the western province of Palawan.