A Manipur Police commando and two police constables were killed while nine others were injured when militants ambushed road-opening parties at two different places in Chandel district of Manipur on Thursday.
The two jawans were among the four injured in the blast in the morning and they succumbed at the Army Hospital at Leimakhong, police said.
No casualties were reported in the explosions that took place in a gap of about 20 minutes at 8 pm on Friday.
