Mantripukhri, Sep 28 (ANI): The Amway office located near the NRL Oil Pump in Mantripukhri under Heingang Police Station witnessed a hand grenade explosion. There were two grenade attacks, out of which one grenade exploded on top of the Amway head office. The officers of Heingang police along with senior police personnel rushed to the spot to take stock of the situation. No casualties were reported in the explosion. Dinesh Kumar Rampal, a local resident said that similar blasts have happened twice in the last few days. With a series of such events, the Amway office in Imphal has been under heavy pressure over monetary demands from the militant outfits on several occasions.