Security forces imposed indefinite curfew in tehsil Kabal and Matta of Swat and carried shelling at militants' hideouts from Kanju check post whereas unknown persons torched a girls school in Mangora. Accroding to sources, curfew has been imposed in Sarsanai, Tatanu Bandai, Kotlai, Hazara, Aligarama, Wanai Check post and Brampul areas of tehsil Kabal and Matta in Swat.