The assault comes amid a series of peace talks between Washington and the Taliban that both sides say are making progress, but which so far have yielded no reduction in violence in the gruelling Afghan conflict.
Taliban spokesman Qari Yousuf Ahmadi said the afternoon attack in Afghanistan’s second-largest city started with a car bomb, then saw gunmen storm the police compound.
“A number of mujahideen equipped with heavy and small arms breached the headquarters and launched their operations inside,” he said.
Baheer Ahmadi, the Kandahar governor’s spokesman, said in a statement that 11 people had been killed, including nine civilians and two police officers, while another 80 — including women and children — were wounded.
He earlier had given a toll of 12 dead.
Interior ministry spokesman Nasrat Rahimi said eight attackers were involved. Two blew themselves up, while the remaining six were “cornered in a building”.
Hayatullah Hayat, the provincial governor for Kandahar, said Afghan security forces had launched a “clean-up operation” to see if any attackers were remaining.