Imphal: Three persons were injured when a powerful grenade thrown into a shop exploded in Manipur`s Imphal East district on Saturday, police sources said.
The grenade was hurled at the shop at HPTA area near here by two suspected militants who came on a two wheeler at 1.30 pm, the sources said.
The injured were hospitalised.
The police said it would be investigated whether extortion was involved.
No individual or group has claimed responsibility for the blast.