An explosion in a rebel-held area of Homs killed over 50 Syrian opposition fighters Sunday, including dozens of senior officers, Hezbollah sources and Al Arabiya reported.
It was initially unclear whether the explosion was the result of devices previously planted in the Jourat Al Shayya area, if it was an accident, or if it was an ambush by regime forces.
Some reports said up to 75 rebel fighters had been killed.
