A Taliban suicide car bomber targeted a police station in the Afghan capital on Wednesday, killing 14 people and wounding 145, most of them civilians, officials said in one of the worst attacks in Kabul this year.

The shattering morning blast rocked much of the city, just a day after a U.S. envoy and the Taliban reported progress in their talks on negotiating an end to the nearly 18-year war in Afghanistan. Many Afghans worry what will happen once the estimated 20,000 U.S. and NATO troops in the country return home.

The Taliban bomber detonated his explosives-packed car at a security checkpoint outside the police headquarters in a minority Shiite neighborhood in western Kabul, police spokesman Firdaus Faramarz said. A military training school is located nearby.

Read more: AP