A dual mode grenade (2) is selectively operational in lethal and non-lethal modes. The grenade (2) contains a hard back (10) containing fuse/safing assembly (14), and the central explosive charge (12) surrounded respectively by non-lethal (N-L) projectiles (8), N-L case (6), and the removable lethal fragmentation shell (4). The grenade operates in lethal fragmentation mode when all its components are present and the fragmentation shell bursts into plurality of lethal projectiles (18). The N-L operation of the grenade is effected by the removal of the fragmentation shell (4) whereby N-L projectiles are allowed to eject outwards in response to the bursting of explosive charge (12).