A Philippine historical commission, former human rights victims and left-wing groups are opposing President Rodrigo Duterte's approval of a plan to bury late dictator Ferdinand Marcos in a heroes' cemetery, reigniting a politically divisive and emotional debate.

A coalition of groups opposed to the plan said Tuesday that Marcos was a plunderer who ordered the torture and deaths of thousands of his critics.

Duterte gave the go-ahead Sunday for the burial, which is expected next month. He said Marcos, who was ousted in a 1986 "people power" revolt, is qualified to be buried at the military-run cemetery as a former soldier and president.

The National Historical Commission of the Philippines, meanwhile, said it opposes Marcos' burial because his military record is "fraught with myth, factual inconsistencies and lies."