A loud explosion was heard near a military site in the Syrian port city of Latakia on Wednesday, an opposition monitoring group said, but the cause of the blast was unclear.
Explosions in Latakia, part of President Bashar Assad's stronghold on the Mediterranean coast, have been extremely rare during Syria's two-year-old conflict.
Residents on Twitter and a report from the Syrian Observatory for Human Rights said the blast appeared to have hit the southern outskirts of the city.
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