Afghan and British Soldier Are Killed in Attack KABUL, Afghanistan - An attacker wearing an Afghan Army uniform killed an international service member in southern Afghanistan on Sunday, NATO said. Afghan officials said international forces returned fire, killing one member of the Afghan Army. Sayed Malook, a senior Afghan Army commander in Helmand, said that the international service member who died was British, and that the attack took place inside a small district camp in Helmand Province used by both Afghan and British soldiers. Two Afghan officials said it was unclear whether the Afghan soldier who had been killed had carried out the original shooting. As a result, the British security forces and Afghan police had sealed off the camp compound, disarmed the Afghan soldiers inside the camp and were checking their weapons to discover who had fired shots. The two officials spoke anonymously because they were not directly involved in the investigation into the shooting. Helicopters were hovering over the compound, in Nad Ali district of Helmand, checking for anyone who might have fled the camp, they said. Helmand Province, where the attack took place, is where most of the 9,500 British forces in Afghanistan are concentrated. A spokesman for the Ministry of Defense in London could not comment, and a spokesman for the International Security Assistance Force in Kabul would give no more details beyond the fact that one of its service members had been killed, and it was investigating. In three other episodes, 10 Afghan civilians died in separate explosions on Saturday and Sunday involving roadside bombs. In Khost Province, a family was returning from hospital late Saturday with their newborn baby when their car hit a roadside bomb, killing all six in the car, according to Commander Roshan, police chief of Sobbari district in Khost. Two people died and two were wounded in Helmand Province when their car hit a bomb on Sunday, the police said. And two people walking on a road in Kandahar were killed when they stepped on a roadside bomb, according to the provincial governor's spokesman. Graham Bowley reported from Kabul, and Taimoor Shah from Kandahar, Afghanistan.