An Arab-Israeli has been kiled fighting in Syria on the side of Al-Qaeda-linked Al-Nusra Front terrorist group.

An Arab-Israeli has been kiled fighting in Syria on the side of Al-Qaeda-linked Al-Nusra Front terrorist group, his relatives said on Wednesday.

Muayyed Zaki Jumaa Ighbariya, 28 years, left his village near the Arab-Israeli city of Umm al-Fahm in the north of the Occupied Territories and crossed into Syria via Turkey about a month ago, a relative who requested anonymity told Agence France Presse.

Ighbariya's family said prayers for him on Wednesday morning, having learned of his death the day before, without specifying how they had received the news.

Ighbariya is thought to be the first declared Arab-Israeli killed in the Syrian conflict, but the Zionist police claimed they had arrested three other Arab citizens who went to fight against the Syrian national military for "leaving the country illegally and travelling to a hostile state".

Police spokeswoman Luba Samri said the three men had also joined the Al-Nusra Front. Two of them were sentenced in August to only 19 months in prison each.

However, the occupation entity has repeatedly confirmed the establishment of field hospitals on the border area with Syria to treat the wounded of militiamen fighting against the Syrian army.

Syria was hit by a violent unrest since mid-March 2011, where the Syrian government accuses foreign actors of orchestrating the conflict by supporting the militant opposition groups with arms and money.