Explosions in Aleppo after rebel fighters destroy a Syrian regime headquarters in the old city<br/> <br />Amateur video which can not be independently verified appears to show anti-government forces using tunnels to reach and demolish targets.<br/> <br />Rebel groups are splintered in Syria, where United Nations says the conflict that has now entered its fourth year has left more than 200,000 people dead.<br/> <br />As the gunfire continues, no end in sight.
