http://www.bbc.co.uk/news/world-south-asia-12413469 'Schoolboy' bomber kills 20 at Pakistani army base A suicide bomber has attacked an army facility in Pakistan's troubled north-west, killing at least 20 soldiers and injuring others, officials say. Police described the bomber, who struck in the city of Mardan, as a male teenager dressed in school uniform. He attacked as soldiers conducted morning training, residents said. There had been a relative lull in attacks on the army in the region, where Taliban militants are active, correspondents say. Prime Minister Yusuf Raza Gilani condemned the attack on the Punjab Regiment Centre. "Such cowardly attacks cannot affect the morale of the security agencies and the resolve of the nation to eradicate terrorism," he said in a statement. Previous attack "It was a suicide attack," Mardan police official Abdullah Khan told AFP news agency. "The teenager bomber was on foot and was wearing a school uniform." It was not immediately clear how the bomber got into the army centre undetected. Such army centres are usually heavily guarded. However, a bomb attack on the same centre in 2006 killed at least 20 soldiers. The Punjab Regiment is one of Pakistan's most famous military units.