A group of Taliban insurgents launched an attack on NATO bases in eastern Afghanistan 's Khost province early on Saturday, police said. 'A group of Taliban terrorists raided two bases of NATO-led troops in Khost province early Saturday but so far six attackers were killed,' provincial police chief Abdul Hakim Ishaqzai told Xinhua. Meantime, a Taliban spokesman Zabihullah Mujahid told media via telephone from undisclosed location that they are responsible for the attack, adding that 20 suicide bombers stormed NATO bases in Khost province. 