Syrian activists say troops of Al-Assad regime are battling its opposing fighters on areas around the city of Aleppo. The Britain-based Observatory for Human Rights activist group says Wednesday's fighting also concentrated on the northern Idlib province, according to a report of the Associated Press. The fighting comes after opposition fighters' scored several strategic victories in these areas against the regime in Damascus, capturing a military air base in the province of Aleppo on Tuesday and the country's largest dam on Euphrates River the day before. The opposition fighters control large parts of land they captured during 22 months of fighting in Syria's civil war, which the United Nations says has claimed nearly 70,000 lives.