Two Afghan guards were killed Thursday when suicide bombers and attackers besieged the offices of a logistics company working with foreign forces, close to the NATO-led force's western HQ. Foreign forces were deployed to quash the attack at the offices of Monaco-based international firm ES-KO on the outskirts of Herat city, where NATO troops passed control to Afghan forces four months ago. It happened a few hundred metres (yards) from ISAF's headquarters in western Afghanistan, which is Italian-led, as well as Herat's airport. The attack raises fresh questions about security in the relatively peaceful province, which was handed over in July as part of plans for the 140,000 mainly-US foreign troops to leave Afghanistan by the end of 2014.