A large Syrian flag flutters above Tishreen Park in Damascus. AFP
Syria's official Alekhbariah channel reported "a loud explosion of unknown origin in the city of Damascus".
An AFP correspondent said he heard the sound of an explosion while driving his car in the capital's central Umayyad Square.
Syrian security forces detonated leftover munitions as part of a training exercise in the capital, a security source told Reuters.
The source from Syria’s General Security Service, which is broadly responsible for security matters, told Reuters no-one was wounded in the controlled blast.
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