Jharkhand, Sep 21 (ANI): Police arrested seven hardcore Maoists of the People's Liberation Front (PLFI) group near the Porahat forest area in Jharkhand. Maoist organisation, PLFI had camped in the Singhbhum district area, which is considered hub of the insurgent groups. Superintendent of Police, Narendra Kumar Singh, said the arrest was a major breakthrough as they recovered ammunition as well as further leads. Singh added that a couple of days back, Special Police Officer was killed by the PLFI.