Chandel Superintendent of Police Angam Kameie said the injured trooper, Appu Barma, was flown to a military hospital in Imphal West district. Barma suffered shrapnel injuries.
The police said the incident took place when the troopers were on foot patrol at Joupi and a remote-controlled bomb exploded. The militants then opened fire using semi-automatic rifles, forcing the troopers to retaliate.
No militant group has claimed responsibility for the attack.
The NSCN(K) in collaboration with some other militant groups ambushed a column of troopers of Dogra Regiment on June 4, 2015 in Chandel district killing 18 troopers.