Four people were killed in a utility helicopter crash in southwest China's Chongqing when the helicopter was performing an aerial photography task on Sunday noon.

The B407 GX-7702 bell helicopter lost contact with people on the ground during the aerial photography from Wanzhou, southwest China's Chongqing, to Liangping. When the crash happened, a pilot, a co-pilot and two staff members were onboard.

Members from a rescue team found that the helicopter had crashed five hours after it lost contact with the ground and all the four people on board were dead.

The reason of the crash is under investigation.