In Afghanistan, two people were killed and at least another injured when two suicide bombers carried out an attack in capital Kabul this afternoon.Sayed Abdul Ghafar Sayedzada, a senior police official, told reporters at the scene of the attack that both bombers detonated their explosives, adding that two drivers were killed in the blasts and exchange of fire between the guards and the attackers. He said one more person working for the company was injured. Witnesses at the scene of the attack said that some foreigners were also working at the firm. Kabul often comes under attack by Taliban militants and other militant groups despite being heavily protected by hundreds of Afghan police and soldiers.A suicide bomber killed four Afghans in an attack apparently aimed at a convoy of foreign forces in Kabul on July 18, and insurgents embarrassed Afghan officials by firing rockets at a major peace conference in the capital last month. In February, two suicide bombers killed 14 people and wounded 32 when they blew themselves up near Kabul's biggest shopping centre and a hotel.