At least 11 people were killed in north-westernPakistan Monday in separate incidents, dpa cited officials as saying. Ten people died in Tirah valley of Khyber tribal district near theAfghan border when low-intensity explosives being stored in a housewent off accidentally.Women and children were among the dead, local administration official Manzoor Hussain Shah said.Elsewhere, a teenage boy was killed when a suicide bomber blewhimself up outside a government school in Hangu district ofnorth-western Khyber-Pakhtunkhwa province, local police chief Iftikhar Ahmed said.