Yamoun's death was announced by several radicalist websites last weekend. There is no official confirmation yet, but fellow fighters wrote on Facebook that "he left for paradise as a martyr." It is said that Yamoun was killed when an electricity post fell on his head during fights.
Investigators consider Yamoun as a key figure in convincing dozens of Antwerp youngsters to join the fight in Syria. It is believed that he been participating in the civil war in Syria for 6 months.