Taliban militants launched attacks on three NATO combat posts in southeastern province of Paktika, a Press TV correspondent reported.
NATO says the strikes have sparked clashes between its forces and the Taliban.
“US and Afghan forces are thwarting insurgent attacks on three combat operation posts in… Paktika province today,” NATO said in a statement.
The alliance says one of its troops has been injured along with four Afghan soldiers.
Kabul government sources say at least seven attackers were killed by Afghan and NATO soldiers.
But Taliban spokesman Zabihullah Mujahid says at least 24 foreign and Afghan soldiers have been killed.
Similar strikes against Afghan and foreign bases in the region have recently intensified.
Elsewhere in the country, at least three more US-led foreign forces have been killed in separate attacks in southern Afghanistan.
NATO says one of the soldiers was killed in a bomb blast.
Two Americans were also killed in a gun attack by a prisoner in a coalition jail.
The alliance says the incident – which happened on Saturday – is under investigation. NATO has withheld other details on the incidents.
The deaths bring to over 425 the number of US-led forces killed in Afghanistan so far this year.
Meanwhile, the military alliance says a German drone has crashed in the northern Konduz province. NATO has blamed a technical glitch for the incident.
Foreign forces are experiencing some of their deadliest days in Afghanistan since the start of the US-led invasion of the country nine years ago.
According to official NATO tally almost 2,000 foreign soldiers have been killed in Afghanistan so far.
This is while Afghanistan’s official Baakhtar news agency said in a recent report that the US-led war has claimed the lives of nearly 4,500 foreign soldiers since 2001.
Source: Press TV