An Israeli army veteran from the country's Arab minority has joined Islamic State insurgents in Syria, an Israeli security official has said, confirming a local media report.
Israel says dozens of Muslim Arab citizens have illegally travelled to Isis's Syrian or Iraqi fiefdoms, raising concerns they might return radicalised and trained to carry out armed attacks at home.
Arabs make up 20 percent of Israel's population and are generally exempted from military service while most Jewish citizens are drafted. A few Israeli Arabs volunteer for the army or paramilitary police, however.
Walla News said one of the Islamic State recruits previously served in Israel's Givati infantry brigade, a unit that has often operated in Gaza.
Walla did not name the man or provide details on when he left for Syria, saying only that he was a Muslim from a village in northern Israel, was estranged from his family and would have been discharged from the army in January 2014.
Asked about the report, an Israeli security official told Reuters: "We are familiar with this case." The official did not elaborate.
Israel has been cracking down on suspected Islamic State sympathisers in its Arab communities and among Palestinians in the occupied West Bank. The ultra-violent jihadi group also has a presence in the neighbouring Gaza Strip and Egyptian Sinai.
Israeli concerns were raised in October after two videos surfaced in which militants identifying themselves as Islamic State members and speaking Arabic-accented Hebrew threatened to attack the country.
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