The Indian army says it attacked insurgent groups along its border with Myanmar days after the rebels killed 18 Indian soldiers in an ambush in the insurgency wracked remote northeast.

Major. Gen. Ranbir Singh, a top army officer, says the army was in communication with Myanmar authorities on its operation on Tuesday and inflicted "significant casualties on the rebels."

Last Thursday, the rebels using rocket-propelled guns and automatic weapons ambushed the Indian army convoy in Manipur state.

The state has several active militant groups. None claimed responsibility for the attack which also wounded 14 soldiers.