A blast struck a NATO patrol in southern Afghanistan, killing two soldiers, the alliance said in a statement Monday. The troops were caught in an explosion during a routine patrol Sunday in the volatile region, where Taliban fighters are active, the statement said. The two soldiers were airlifted to a military hospital where both died of their injuries, NATO said. The nationalities of the soldiers and further details on the location of the blast were not revealed. More than 8,000 people were killed in the insurgency in 2007, the deadliest year since the 2001 US led invasion.