YANGON: Myanmar’s military said on Wednesday it was investigating the death of five villagers during an interrogation by soldiers and would punish wrongdoers, a rare admission from an army long accused of rights abuses. The military, which ruled over the impoverished country for nearly half a century until 2011, seldom admits to misconduct despite a stewardship marked by brutal repression. Rights groups say it has a particularly poor record of abuse in frontier states, where troops are locked in long-running wars with ethnic rebels fighting for greater autonomy. Both sides have been accused of everything from using child labor to running a booming drug trade in the remote border regions. But on Wednesday the military’s chief of security admitted that five villagers in war-torn northeastern Shan state were killed while they were questioned by soldiers last month.