The bomb, allegedly planted by militants, exploded at Kumbi area while the personnel were busy in their morning exercise.
The injured were taken to their post of 33rd Assam Rifles located at Sendra, about 4 km from the spot.
The condition of some of the injured was stated to be serious.
The sources said it was not yet known what kind of bomb was used by the ultras.
No individual or group has claimed responsibility for the incident so far.
The banned Revolutionary People's Front (RPF) had earlier announced that it would intensify its strikes against security personnel in near future.
Activists of the People's Liberation Army (PLA), armed wing of the RPF, had yesterday blasted a bomb at Tiddim area in Imphal West district injuring an jawan and a civilian.
