The event comes in the wake of a number of other violent episodes in recent days.
The announcement today said the most recent incident occurred on 25 January in a remote part of the southern Kandahar Province.
In a separate attack, two police officers were killed and two wounded when their vehicle was hit by a roadside bomb in the south of the country today.
District police chief Haji Zaman blamed Taliban guerrillas for the attack, which happened on a main road in Helmand province. Other Recent Episodes
Officials announced on 26 January that insurgents had ambushed an army post in Afghanistan, killing two local soldiers. An Afghan army general, Akram Sami, said the attack occurred late on 24 January in the southeastern Paktika Province.
In Kandahar Province, a Defense Ministry spokesman reported that a bomb had destroyed a fuel tanker supplying U.S.-led coalition troops on 25 January. No one was hurt in that incident. The spokesman, General Mohammad Zahir Azimi, said six mortars were also fired at an Afghan army base in neighboring Oruzgan Province, but caused no casualties.
Azimi also said that security forces in the western Herat Province had defused 10 rockets rigged up to be fired at the main provincial airport, also on 25 January.
(compiled from agency reports)