They are serving with a Nato-led International Security Assistance Force (ISAF) made up of soldiers from 37 countries.
Western casualties
Six foreign soldiers have been killed in attacks in the past week, including a suicide bombing that killed three Germans in the northern town of Kunduz.
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A Finnish soldier died in a bomb attack on Wednesday and a Canadian soldier was killed on Friday.
The Afghan interior ministry said, meanwhile, that seven Taliban, including two commanders, were killed in an operation on late Friday in Helmand's Gereshk district.
And Kandahar city was hit on Saturday by the latest in a series of suicide attacks to strike Afghanistan.
The attacker, who was on foot, struck a police patrol on a main road in the city about 50m from the office of Assadullah Khalid, the provincial governor.
"Three policemen and a civilian passerby were wounded in the suicide attack today," Asif Khan, a police officer, said.
Increasing attacks
Kandahar has suffered the most in a growing number of suicide attacks carried out by the Taliban in the campaign against the Afghan government and its international allies.
On May 17 the provincial governor's armoured vehicle was the target of another suicide bombing, but he was not in it at the time.
The blast wounded Abdul Karim Khoram, the information minister, who was in the convoy. Two civilians were killed in the attack, for which the Taliban claimed responsibility.
Hours earlier a double bombing killed seven guards and police.

Source: Al Jazeera and agencies