(Reuters) – The Pakistani army said on Saturday the four gunmen who attacked a university in northwest Pakistan were trained in Afghanistan and the assault was controlled by a Pakistani Taliban militant from a location inside Afghanistan. In a briefing to reporters from the city of Peshawar, military spokesman General Asim Bajwa said the militants who stormed Bacha Khan University in Charsadda on Wednesday, killing at least 20 people, received training in Afghanistan and crossed over into Pakistan from the Torkham border between the two countries.