Heavy fighting between Syrian rebels and regime forces in northern Aleppo.<br/> <br />Video obtained by Reuters shows the Free Syrian Army firing machine guns and heavy artillery on regime forces.<br/> <br />State television announced earlier this month that the Syrian army had advanced into areas dominated by rebel fighters since the start of the civil war.<br/> <br />The area is a key link between the countryside and the city itself, and is an important supply route.<br/> <br />As the U.S. bombs Islamic State targets elsewhere in Syria, regime forces are cracking down on rebel groups in western and northern Syria, in a war that has already claimed the lives on nearly 200,000 people.
