According to lieutenant Truong Quang Thanh of the Administration Division of the Nghia Dan district Police Department, the accident which is about 100km from Vinh city of Nghe An occurred while heavy rain making their rescue ever more challenging.
Two military officers, including lieutenant-colonel Khuat Manh Tri, 40 from Hanoi and colonel Pham Giang Nam, 46 from Thai Binh province were killed in the helicopter crash.
The SU-22 fighter aircraft No. 8551 lost contact with ground traffic control at 11.35 a.m.
Functional departments of Nge An province and Nghia Dan district have coordinated with forces of the Ministry of National Defence and the Air Defense-Air Force Service to protect the scene of the accident.