NATO says Taliban militants have shot down an unmanned aircraft belonging to US-led forces in the troubled northeastern Afghanistan.

The US-led military alliance said in a statement that the unmanned plane was shot down by Taliban militants over Kapisa Province, a Press TV correspondent reported on Monday.

Taliban says it has the wreckage of the NATO drone.

The militants have proven resilient faced with NATO's 150,000 strong-contingent.

They have stepped up their attacks on US-led forces, inflicting an increasing number of casualties.

The Taliban claim they have shot down several aircraft and NATO choppers in different parts of Afghanistan over the past few months.

The war in Afghanistan has become the longest war in US history. With civilian and military casualties at record highs, many question the motives in the ongoing conflict.

The developments also come as Taliban militants have been making inroads in different parts of Afghanistan.