In Afghanistan, two NATO soldiers were killed in a roadside bomb explosion in southern part of the country today. A NATO statement issued did not disclose the nationality of the killed. <br/><br/>Taliban has vowed to increase its attacks on Afghan troops and around 130,000 foreign soldiers stationed in the country. <br/><br/>Meanwhile, six schoolboys and four of their teachers were injured today when a bomb hidden inside a school in south-eastern province of Khost exploded.<br/><br/>The Interior Ministry condemned the bombing and blamed 'enemies of peace and stability of the country,' a common term used by Afghan officials to describe the Taliban.