The Taliban claimed responsibility for the explosion, which occurred near small shops in a parking and waiting area for trucks that supply logistics to Kandahar Air Field, a massive military installation run by the U.S.-led coalition.
One suicide bomber detonated his motorbike filled with explosives first. Then, as people rushed to assist the casualties, another suicide bomber on foot walked up to the area and blew himself up, said Javid Faisal, a spokesman for Kandahar province. He said the death toll stood at 22 and that 50 were wounded. All the dead were civilians, he said.
Taliban spokesman Qari Yousef Ahmadi claimed responsibility for the attack.
The explosion occurred 500 meters (yards) from an Afghan military base and about five kilometers (three miles) from the main gate to the air field.