Afghan officials say a suicide bomber has rammed his explosives-laden car into a convoy of NATO troops in the southern part of the country, wounding four soldiers and one Afghan civilian.

A NATO spokesman said the attack took place Tuesday in Kandahar city. He did not reveal the nationalities of the wounded soldiers but the convoy was led by Canadian troops.

NATO says Taleban fighters ambushed a separate Canadian convoy late Monday in Kandahar province, wounding two soldiers.

Meanwhile, British troops say they killed nine suspected Taleban insurgents in neighboring Helmand province. They say they used high explosives to overwhelm the insurgents after spotting them preparing to attack.

In eastern Khost province, Afghan and U.S.-led coalition forces say they captured three suspected al-Qaida militants during a pre-dawn raid and confiscated weapons and ammunition.

Also Tuesday, the U.S.-led coalition said several rockets fired by suspected Taleban insurgents struck a nomad camp in the city of Gardez in eastern Paktia province, injuring two civilians.

Violence has escalated in recent weeks since NATO forces moved to southern Afghanistan to destroy suspected Taleban hideouts.

Some information for this report was provided by AP.