A rebel fighter raises his weapon after firing a missile Sunday toward Syrian government troops in the northern city of Aleppo. Syria's largest city has been the scene of heavy fighting for the past three months. Both sides control part of the city, and the fight has been a stalemate recently. Narciso Contreras/AP hide caption

itoggle caption Narciso Contreras/AP

An image from amateur video released by Ugarit News purports to show Aleppo under fire. The AP cannot independently confirm the authenticity of the image. AP hide caption

itoggle caption AP