At least 24 people have been wounded in a suicide car bomb explosion in the southern Afghan province of Kandahar, police said.
The attack occurred in Spin Boldak town on the Pakistan border. The injured included 16 civilians.
The town is situated 70 miles (110km) from the provincial capital, Kandahar, which is a Taliban stronghold.
In the past few weeks, there have been a wave of suicide attacks in Afghan cities, including the capital, Kabul.
''Our forces and personnel from the intelligence department were following the suicide attacker's car," commander of the Afghan border police forces in Spin Boldak told the BBC.
"When he realised that he had no way of fleeing the area, he blew himself up," he said.
One officer told the BBC that the attacker "wanted to get into the district governor's office".
Militants have attacked the Spin Boldak area many times in the past.
At least 17 people were killed and 23 others were wounded last month in a suicide attack in a crowded public bath house in the town.