Three Cambodian farmers from the same family died after their truck hit an old anti-tank mine left over from decades of civil war in the country, police said Monday.
Two other relatives were seriously injured in the blast in northwest Battambang province on Sunday, said local military police chief Eng Seng Oeun.
"There was heavy rain and the dirt road had become soft. So when their truck reached the area, the mine exploded," he said, adding that the deceased men -- aged 17, 19 and 30 -- were on their way home with a truckload of corn.
Nearly three decades of conflict have left impoverished Cambodia one of the world's most heavily mined countries.
In 2011, leftover landmines and other unexploded ordnance killed 43 people and caused 168 injuries including 33 amputations, according to official data.