The Government today asked Naga insurgent group NSCN-IM to stop all kinds of extortion in Nagaland and parts of Manipur saying such activities are not acceptable from a group which has signed a 'framework agreement'. Last August, the government had signed the 'framework agreement' with the NSCN-IM for finding a final solution to the decades' old Naga issue. The pact was signed in the presence of Prime Minister Narendra Modi, Home Minister Rajnath Singh and National Security Adviser Ajit Doval by the outfit's leader T Muivah and government's interlocutor R N Ravi at the prime minister's residence in New Delhi. At a meeting of the Ceasefire Monitoring Group (CFMG) held in New Delhi, the government raised the issue of extortion by the NSCN-IM in different parts of Nagaland and Manipur and asked it to stop such activity. However, the NSCN-IM team, led by senior leader V S Atem, rebutted the government claim saying the group does not indulge in extortion but "levy tax" from people, sources said. The government team, led by Special Secretary (Internal Security) M K Singla, conveyed to the Naga group such activities were not acceptable, the sources said. The NSCN-IM has been in talks with the Centre's representative for last 17 years, even since it had entered into a ceasefire agreement in 1997.