Two children and a man were killed after a bus overturned on a mountain pass in the northwestern province of Dien Bien on Saturday, Nguoi Lao Dong newspaper reported.
The bus was traveling from the northern province of Hung Yen to Dien Bien when it crashed into the road barrier and overturned on the Pha Din mountain pass on National Highway 6A.
Three passengers a boy and a girl, both 11 years old and a man yet to be identified died on the spot.
Seventeen others were injured, two of them seriously, in the accident.
Initial investigations indicate that the bus driver lost control of the vehicle because the road was slippery after heavy rains.
The 40-bed bus was carrying 23 people 20 passengers and three drivers at the time of the accident.