Police say three farmers died in Cambodia after their tractor struck an anti-tank mine left over from the country’s civil war. Deputy police chief Noun Muth of the district of Samlot said that three people died instantly and three others were critically wounded. An estimated 4 million to 6 million land mines and other unexploded ordnance still remain in Cambodia from more than three decades of armed conflict. A similar explosion last week also involving a tractor in northwestern Battambang province killed six people and wounded two others.—AP