Kabul (AFP) - Two Taliban suicide bombers hit army buses in Kabul Wednesday, killing at least seven people in a coordinated attack, officials said, a day after the new Afghan government signed a deal for US troops to stay in the country.The Taliban, who strongly opposed the agreement with the US, claimed responsibility for the early-morning twin blasts that targeted vehicles taking military employees to work in the capital."There have been two suicide attacks targeting buses carrying Afghan national army personnel," Farid Afzali, chief of the city's police investigation department, told AFP."Six military personnel and one civilian were killed in one attack, and 15 were injured.