Indian troops are on patrol in two towns in the northeastern state of Meghalaya where a curfew has been imposed in response to separate student demonstrations that turned into deadly clashes with police. Soldiers were sent to the towns of Tura and Williamnager on Saturday where at least 11 students were killed when police responded to stone-throwing crowds with gunfire Friday. At least 90 people, including police officers, were hurt in the violence. The students had gathered in the two towns to protest the relocation of the offices of the board of education to an area dominated by a rival ethnic group. The relocation plan calls for the board of education office to be moved to the state capital, Shillong. Members of the Khasi ethnic group believe the move is necessary because of alleged irregularities in examination results. The Garo tribe opposes the move.