Watch for the explosion.<br/> <br />It happened Thursday in Syria's second city, Aleppo.<br/> <br />That's where rebels say they detonated a huge bomb beneath a hotel used by forces loyal to President Bashar al-Assad.<br/> <br />The rebel group called the Islamic Front claimed responsibility.<br/> <br />It posted these videos of the blast online, which Reuters cannot independently verify.<br/> <br />The Islamic Front says 50 soldiers were killed in the blast, but doesn't say how it got that number.<br/> <br />A UK-based monitoring group, which tracks violence in Syria using sources on the ground, says at least 14 members of the security forces were killed.<br/> <br />State TV showed the incredible damage at the site where the Carlton Hotel once stood.<br/> <br />Both state TV and the monitoring group said other buildings were also damaged.<br/> <br />This is the edge of the city's medieval citadel.<br/> <br />State TV said nearby buildings were rich with antiquities but gave no details of casualties.
