Security forces in the north-eastern state of Assam have been told to shoot on sight after tribal clashes claimed 34 lives in the past two days. An indefinite curfew is also in force in Karbi Anglong district, where violence erupted late on Sunday. In one attack, Dimasa tribal militants massacred 22 members of the rival Karbi tribe, eight of them women, police say. Another 12 Karbis were killed later. The two tribes have a long history of feuds over territory in the state. Set alight Police officials told the BBC that 22 people belonging to the Karbi tribe were dragged...