ROUGH CUT (NO REPORTER NARRATION)<br /> <br />REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE CONTENT OF THIS VIDEO, WHICH HAS BEEN OBTAINED FROM A SOCIAL MEDIA WEBSITE.<br /> <br />Syrian rebels detonated a huge bomb underneath an Aleppo hotel used by President Bashar al-Assad's forces on Thursday (May 8), destroying it and damaging other buildings on the edge of the city's medieval citadel.<br /> <br />The rebel Islamic Front, which claimed responsibility for the explosion, published video footage which showed a huge column of debris and dust erupting into the Aleppo skyline.<br /> <br />It said 50 soldiers were killed in the blast but did not say how it arrived at that death toll.<br /> <br />The Syrian Observatory for Human Rights, which monitors the violence through a network of security and medical sources and activists across Syria, said at least 14 members of the security forces were killed.<br /> <br />It said Islamist fighters had placed explosives in a tunnel underneath the Carlton Hotel, which it said was used
