At least three children were killed Tuesday when unknown gunmen attacked a school bus with rockets in north-western Pakistan near the Afghan border, officials said. The incident occurred in Matani neighborhood of Peshawar, the capital of Khyber-Pakhtunkhwa province, according to a report of the German Press Agency "DPA". Siraj Ahmad, district coordination officer, said one of the rockets fired by the "unknown miscreants" hit a school bus and killed three children and the driver. Hospital official Rahim Jan Afridi said it had received 19 injured including seven children after the attack.