KABUL (AFP) - A Briton and a South African working for international courier company DHL where killed along with an Afghan guard in a shoot out in Afghanistan's capital Kabul Saturday, officials said. It was the second fatal shooting involving the international community in the city in five days with a dual national British-South African aid worker gunned down Monday in a killing claimed by the Taliban. Separately Saturday, two Turks and two Bangladeshis were reported kidnapped elsewhere in Afghanistan, which this year has seen a spiral in violence that has mostly been blamed on Taliban. It was unclear what prompted Saturday's exchange of fire outside the DHL offices but one senior police official said an argument had erupted between the foreigners and some Afghans and it was not a Taliban attack. "Two foreigners and one Afghan have been killed," said Kabul deputy police chief Alishah Ahmadzai. Two people were also wounded, he said, without giving their identities. The British embassy said later that they were a Briton and a South African. The foreigners, worked for DHL, said a spokesman in Berlin for the German post office, which owns the international courier. Afghan police said they were the Kabul director and deputy director of the company. One of them was shot dead in the front passenger seat of a four-wheel-drive vehicle, said an AFP reporter who saw his body slumped in the seat. The other was in the back seat, according to a policeman. The vehicle was covered with a plastic sheet so witnesses could not see inside. In other incidents, two Turkish nationals were kidnapped in the eastern province of Khost along with their Afghan driver and translator, provincial governor Arsala Jamal said Saturday. The men had been contracted to erect a radio mast and were captured while driving to the town of Khost from an outlying district, Jamal said. There had been no contact from the abductors, who were unknown, he said. A spokesman for the Taliban said the militia was not responsible and blamed bandits. In Dhaka, the Bangladesh Rural Advancement Committee (BRAC) said two of its Bangladeshi staffers were kidnapped in the central province of Ghazni on Friday. "We don't know who abducted them and where they have been taken," said Mahbub Hossain, BRAC executive director.