The Britain-based Syrian Observatory for Human Rights said Tuesday fighting in Aleppo has spread to new areas as opposing fighters of the regime try to expand their hold inside Syria's largest city. Despite intense bombardment from government warplanes, helicopters and artillery, the fighters in Aleppo have now withstood two weeks of counterattacks by President Bashar Assad's troops and are clawing toward the city center. Local activist Tamam Hazem says fierce clashes are going on in Bab Jnein and Sabee Bahrat districts near the heart of Aleppo, according to a report of the Associated Press.