Suicide bombers struck a busy market in southern Afghanistan on Wednesday, killing at least 21 people and leaving dozens wounded, authorities said.
The bombings injured at least 50 others, said Abdul Razaq, a provincial police chief.
A first bomber on a motorcycle detonated his explosives near a restaurant in a busy market in Kandahar city, according to the police chief. The market is crowded with civilians and truck drivers, most of them transporting NATO supplies.
When residents flooded the area after the first attack, a second bomber blew up his explosives in the crowd, causing more casualties, Razaq said.
The attacks occurred near the Kandahar airfield where NATO troops in the region are based.
Kandahar is the birthplace of the Taliban and has been the site of fierce fighting between international forces and insurgents.
In another incident overnight, a NATO airstrike killed 18 people in Logar province, said Sahib Khan, a provincial official.
Some of the victims were women and children, but it was unclear whether all the dead were civilians, Khan said.
NATO forces said the incident occurred when soldiers returned fire during a mission targeting a Taliban leader.
"While conducting a follow-on assessment, the security force discovered two women who had sustained nonlife-threatening injuries. The security force provided medical assistance and transported both women to an ISAF medical facility for treatment," a military statement said. "Multiple insurgents were killed and the Afghan and coalition security force seized several weapons and a quantity of explosives."