Ranchi: Police in Jharkhand on Sunday claimed to have arrested four Maoists, including commander Ravindra Ganjhu alias Aakraman, in Chatra district and recovered a huge cache of arms and ammunition, including a US-made rifle. Official sources said that among those arrested are Ganjhu’s wife Neelam Devi, former Lawalong block head Sachin Kumar Ganjhu, and Amrit.