A roadside bomb struck a police vehicle in southern Afghanistan on Monday, killing a senior police officer and three others, officials said, DPA reported.
The bomb hit the vehicle of District Police Chief Salih Mohammad as he was on his way to Shorabak in Kandahar province, a statement by the governor's office said.
"Police chief of Registan district along with three other policemen were martyred in roadside bombing," it said.
The province's Deputy Police Chief Sher Shan Yousufzai confirmed the attack, saying that three more policemen were injured in the explosion, in addition to the four fatalities.
After nearly ten years' insurgency, the Taliban have been focussing on assassinating officials in recent weeks.
The attack came a day after two gunmen shot dead an advisor to President Hamid Karzai, and a member of the lower house of parliament.
Last week, the president's half brother Ahmad Wali Karzai was assassinated by his close aide in Kandahar city, capital of the province with the same name.