Taliban militants have launched a series of deadly attacks in Afghanistan's eastern Nuristan Province to regain control of Barg-e Metal district, Press TV reported.
The clashes broke out on Friday night after Taliban militants attacked a government office in the region.
Afghan officials said 11 militants were killed and several others were injured during Friday's clashes.
Meanwhile, media reports said that clashes were still continuing, adding that it had spread to other areas in the region.
Militants were reportedly launching attacks on the governor's office, when the security forces returned fire.
Earlier in May, Taliban militants regained control of Barg-e Metal district for several days, but government forces recaptured the area shortly afterwards.
Afghan officials and foreign troops have increasingly fallen victim to Taliban attacks over the past months.
The 2001 US-led invasion of Afghanistan, involving forces mostly from NATO countries, has so far failed to bring security to the war-ravaged country.
The violent incidents and rising casualties in Afghanistan come despite a massive US-led troop surge in the war-torn country.
The increasing violence against civilians has led to a sharp decline in support for the continuing presence of US-led forces in the country.