Both strikes were claimed by the Taliban. Kandahar provincial Governor Asadullah Khalid said a bomber detonated explosives strapped to his body near a crowd of about 100 people watching a wrestling match at a fair in Spin Boldak, near Pakistan. Twenty people were killed and several injured.
Hours earlier, a suicide bomber hurled himself in front of an Afghan army vehicle in the provincial capital of Kandahar, killing three soldiers and two civilians, and wounding 16 others.
The Pakistan-based news agency Afghan Islamic Press quoted a Taliban spokesman claiming responsibility for the blast, which, however, he said was caused by a remote-control bomb.
It was the third bombing in that southern province in the past two days, and the bloodiest in a series of suicide attacks in the past four months.
(compiled by news agencies and RFE/RL's Afghan Service)