attack, saying it was a suicide car bombing carried out by a "hero mujahid" on "an important American company which provided security services to the invading forces"."This company was under the surveillance of the mujahedin for a while and thanks God today the opportunity was provided to attack it," Taliban spokesman Zabihullah Mujahid said in a statement.The militia, which was ousted from power in Kabul by a 2001 US-led invasion, is fighting to bring down the Western-backed government and to expel US-led foreign troops.An AFP reporter at the scene said there were signs of a huge explosion beyond an area blocked off by police, and some bystanders had also suffered minor injuries.In May, Taliban bombers disguised in burqas attacked a heavily fortified guesthouse used by Westerners in thesame area. Seven people were killed at the "Green Village" complex used by the European Union, the United Nations and aid groups.A US-led NATO force of some 100,000 troops is backing the Kabul government against the Taliban insurgents, but they are due to pull out in 2014 and are training the Afghan army and police to take over responsibility for security.In eastern Afghanistan, 10 girls aged nine to 11 died when one of them accidentally struck a mine with an axe as they were collecting firewood before going to school in a Taliban-troubled area."An old mine left over from the time of the jihad (against Soviet troops in the 1980s) exploded, killing 10 girls and wounding two others," Chaparhar district governor Mohammad Sediq Dawlatzai told AFP.Nangarhar provincial government