It was one of the deadliest attacks on German troops in the country. Polls show a large majority of Germans oppose the mission to Afghanistan.
Insurgents apparently carried out a rocket attack on a group of soldiers with an armored car close to Pol-i-Khomri camp, the German Defense Ministry said in a letter to members of Germany's Bundestag (lower house of parliament).
The killings brought the number of German dead in Afghanistan to 43 since the Bundeswehr's deployment in 2002. Seven of the deaths have occurred in the past week.
Following US appeals to beef up Germany's presence in Afghanistan, German Defense Minister Karl-Theodor zu Guttenberg said on Wednesday heavier weapons would be dispatched, including two mounted howitzers, to strengthen the artillery.
Despite the latest attacks, Guttenberg, who has visited Afghanistan this week, said Germany still hoped to begin reducing its military presence in the country from next year.
