KUNDUZ (AFP) An Afghan senator was killed when he drove through a police ambush set for Taliban in northern Afghanistan on Wednesday, officials said. Mohammad Younus - also known as Shirin Agha, or Dear Sir - was going home in the early hours when he was shot dead in Puli Khumri, capital of troubled northern Baghlan province, Mohammad Akbar Barikzai told AFP. Barikzai said Younus, a member of Afghanistans upper house of parliament representing Baghlan, failed to stop at a police checkpoint set up as part of a planned ambush of Taliban militants. They continued to drive after being ordered by police to stop so the police opened fire, an Interior Ministry statement said. Unfortunately the senator and his driver were killed and a third person accompanying them was wounded, it said. President Hamid Karzai ordered an immediate investigation into Younus killing, his office said. The Afghan senate called his death a huge loss for the parliament. In southern Afghanistan, a bomb attached to a parked motorcycle ripped through a crowded bazaar, killing three civilians and wounding five in the Nad Ali district of Helmand province, a provincial spokesman said. Two civilians were killed and three wounded when their vehicle struck a roadside bomb in Takhta Pull district of neighbouring Kandahar province, the Interior Ministry said. In the west, two Taliban were killed when the bomb they were planting on a road exploded in Gulistan district, Farah province, provincial police chief Faqir Ahmad Askar told AFP. The British Ministry of Defence said on Wednesday a British soldier has been killed by an explosion in southern Afghanistan, the third to die in the region in three days. The soldier from The Parachute Regiment was killed Tuesday as a result of a suspected improvised explosive device while on foot patrol south of Sangin in Helmand, the ministry said in a statement. He was the third British soldier to be killed in south Afghanistan since Sunday, and brings the death toll since the US-led invasion in Oct 2001 to 243, with 106 killed since the beginning of this year.