Days after the attacks on mobile towers and the killing of two persons, police have reportedly arrested four persons including the mastermind behind the grenade attacks in North Kashmir’s Sopore town.Police sources told CNS that at least four persons have been arrested who are allegedly involved in the recent attacks that were carried out by gunmen in North Kashmir. Sources added that all the four persons are Over Ground Workers of militant outfit Hizbul Mujhadeen. The head of the group has been arrested from Badambagh Sopore where many mobile towers are located.Confirming the arrest of four persons, a police said that investigation is going on in full swing and more arrests are expected in coming days. He said that these persons are also responsible for the grenade attack on mobile tower in Kralateng Sopore.Sources told CNS that police have identified the person who had allegedly installed Ken Wood Repeater device on one of the mobile towers in Sopore. (CNS)