Two Belgian mercenaries who were fighting against the regime in Syria have been killed, Belgian media say.
Some 80 Belgian Muslims are said to be participating in fights in Syria.
They were sent to the Middle East by the so-called Belgian Islamist Movement which is not recognized as a legal institution.
The number of radical Muslims coming from Europe to Syria is on the rise, many of them joining extremist groups linked to Al-Qaeda.
Voice of Russia, RIA