A suicide bomber perched on the back of a motorcycle killed seven people, including four Afghan policemen, in an attack today in the increasingly violent northern province of Kunduz, a government spokesperson said.
Sixteen other people were injured in the midday attack in the provincial capital, also called Kunduz, provincial spokesperson Mahbubullah Sayedi said.
The city is a major transportation hub and lies along a crucial supply line for coalition forces that has been repeatedly attacked by Taliban insurgents, who have also stepped up attacks on police and civilians in the province in an apparent attempt to destabilise local authorities and spread their insurgency beyond their strongholds in the country's south.
Pictures from the scene of today's bombing showed officers loading the back of a police pickup truck with bodies of the victims, including a boy who appeared to be in his early teens.
The body of the suicide bomber lay beside the mangled wreckage of his motorcycle, while windows in nearby shops and cars were shattered by the blast.
While there was no immediate sign of a connection, the bombing came on the first anniversary of a NATO warplane attack on two fuel trucks just outside Kunduz city that killed as many as 142 people, the single largest loss of civilian lives since the 2001 US invasion of the country.
Afghan officials repeatedly warn that such incidents undermine the central government in Kabul and fuel support for its Taliban opponents.
Also today, NATO announced the capture of a Taliban commander and the killing of six insurgents in a raid on a rebel hide-out in the northern province of Takhar.
The attack followed a string of recent raids on militant leaders that aim to demoralise the insurgency and sever contacts between rebel groups.
NATO said a joint Afghan-NATO force was fired on as it approached a compound yesterday where the Taliban commander was hiding. The force returned fire with the backing of coalition aircraft, then evacuated the compound and detained the commander and one of his assistants, it said.
Takhar, which neighbours Kunduz to the east, had been relatively quiet amid rising violence across Afghanistan, but recent incidents point to growing insurgent activity in the province, about 250km north of Kabul along the border with Tajikistan.
NATO says an air strike in the province on Thursday killed about a dozen insurgents, but president Hamid Karzai and other Afghans said the victims were campaign workers seeking votes ahead of this month's parliamentary elections.