The leaders of the frontline Naga separatist group, National Socialist Council of Nagaland (Isak-Muivah), NSCN (IM), today called on the Prime Minister Dr Manmohan Singh and the Home Minister Mr P Chidambaram in New Delhi.<br/><br/>The rebel leaders are set to hold talks in the afternoon with the government's new interlocutor R.S Pandey, former petroleum secretary and former chief secretary of Nagaland .<br/><br/>Sources say that a peace proposal with greater economic autonomy is being offered to them .<br/><br/>AIR correspondent says that that NSCN (IM) wants greater Nagaland with the Naga dominated areas in the neighbouring states of Assam, Manipur and Arunachal Pradesh to be included in it .<br/><br/>This is, however , opposed by these states .<br/><br/>The last round of peace talks between the government and the separatist group held in March 2009 in Zurich, Switzerland ended stalemate.<br/><br/>The NSCN-IM had entered into a ceasefire accord with the Indian government in August 1997. They have held 67 rounds of talks with the government so far.<br/><br/>The rebel group's chairman Isak Chisi Swu and general secretary Thuingaleng Muivah arrived in New Delhi Saturday night from self-imposed exile in the Netherlands.