Mau, In a tragic incident,accidently a hand grenade exploded during a mock drill by Provincial Armed Constabulary in Bhiti area due to which three personnel were injured. Superintendent of Police Shivhari Meena said, that the incident took place yesterday. The victims who suffered with injuries in the explosion were identified as PAC personnel Ramavtar 55, Acchelal Sonkar 40 and Ramji Gupta 40 and rushed to the hospital. The condition of Ramavtar was stated to be serious.