The Manipur Government has stepped up security measures at all border points to prevent entry of NSCN (I-M) general secretary T. Muivah into the state. Official sources said in Imphal today that the step has been taken on the apprehension that his visit might disturb communal harmony. <br/><br/>The National Socialist Council of Nagalim (I-M) leader is to visit his home town at Somdal in Ukhrul district from tomorrow to 10th of this month. <br/><br/>The State cabinet on April 30 decided to prevent entry as it might cause communal disharmony endangering the<br/>peaceful coexistence of different ethnic communities.<br/>