GAUSHALA: A security guard of Nepal Bank Limited based in Gaushala Municipality-7 in Mahottari district has been accused of murdering his fellow worker. Ajay Singh, 45, of Sudama VDC-6 in Sarlahi district is charged of killing coworker Maheshwor Jha, 44, of Sundarpur VDC-9 following a dispute last night, Police Inspector Machchhendra KC said. Accused Singh is on the run after the incident. Police said that a search for the accused is going on.