Three separate roadside bombs killed seven police and a government official in a spate of attacks around Afghanistan, officials said Saturday. A bomb in Khost province on Saturday killed the chief government official in Nadir Shah Kot district, said Wazir Pacha, spokesman for the provincial police chief. Militants fired at the official's car after the explosion, he said. Three others riding in the car, including one of the official's sons, were wounded, Pacha was quoted as saying by Associated Press. Elsewhere in Khost, another roadside bomb killed three border police on Friday, said Sher Ahmad Kochi, a police commander. In the south, a third roadside bomb hit a police vehicle and killed four policemen on Friday in Kandahar province, provincial police Chief Matiullah Khan Qatah said.