A Vietnamese air force training helicopter crashed in southern Vietnam on Tuesday with three people on board.
The deputy transport minister, Nguyen Nhat, said the Eurocopter, EC130, lost contact some 15 minutes after take-off at 8.30 a.m. (0130GMT), adding that the pilot and two students on board remained unaccounted for.
Nguyen quoted an army official that rescued forces as having found the suspected crash site on Dinh Mountain in the province of Ba Ria Vung Tau.
However, Rescue forces were trying to approach the site, where smoke was observed rising into the air.
Meanwhile, Prime Minister Nguyen Xuan Phuc has ordered the Army to review its planes to avoid any further accidents.
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