Guwahati: Four persons were killed in Kokrajhar amidst indefinite curfew taking the toll in the current wave of violence between Bodos and Muslims in the lower Assam district to 10. The four were killed at Jiaguri by armed assailants who fired randomly on a group of persons last night following which patrolling was intensified and vigorous search operations launched to seize illegal arms, official sources said here. Kokrajhar Deputy Commissioner Jayant Narlikar said the situation was under control and the army was conducting flag marches and area domination to prevent further outbreak of violence.