Syrian Kurdish refugees wait for transportation after crossing into Turkey, near the southeastern Turkish town of Suruc in Sanliurfa province September 30, 2014. Tens of thousands more Syrians could be forced to flee their war-torn homeland if Islamic Sta
Syrian Kurdish refugees wait for transportation after crossing into Turkey, near the southeastern Turkish town of Suruc in Sanliurfa province September 30, 2014. Tens of thousands more Syrians could be forced to flee their war-torn homeland if Islamic State fighters continue gaining ground, the U.N. aid chief warned on Tuesday as U.S.-led air strikes pound the extremist group. Valerie Amos told the United Nations Security Council that recent advances by Islamic State - also known as ISIL and ISIS - in northern Aleppo had forced more than 160,000 people, mostly women and children, to escape across the border into Turkey in just a few days. Reuters/Murad Sezer

A French family composed of 11 members was believed to have left the country for Syria to join the ISIS to train and become jihadi fighters. The family hails from the French city of Nice.

Local French news outfit Nice-Matin reported, citing sources, the family have left at the end of September. Their group includes a man, his two sisters and mother, along with their respective spouses and children, including a six month old baby.

Nice-Matin was able to identify the wife of the man as Andrea, a 27-year-old who left with her two sons aged four and six. The paper reported that Andrea had confided to an unidentified friend that she initially didn't want to leave France, "but before Allah I could not stand back." Andrea also reportedly left word for her own parents to say that she is well.

"Do not worry. Accept my decision. Hopefully, I'm in a beautiful area...'" Andrea reportedly wrote to her parents.

Ivano Sovieri, Andrea's father, initially thought his daughter and his grandchildren might just have left for somewhere when he tried to fetch the children at a school in Saint-Philippe in Nice. The school told him the kids had gone to Tunisia because of a death in the family. Andrea's husband was born there. Immediately, Sovieri called a cousin of his son-in-law. There he learned there was no death in the family.

They immediately went afterwards to Andrea's house only to find the door open. When they went inside, it was already very clean. Even the furniture had been removed.

Another family member named Reda, identified as the Muslim father of Andrea's husband, confirmed to the paper his entire family had indeed disappeared. He said religion places an important part in their lives as Musims "but only up to a point. My whole family has disappeared, and I'm scared."

An investigation into the disappearance of the family has been launched by the Paris public prosecutor's office's anti-terrorist section. According to the AFP, Europe's biggest Muslim population comes from France, which is believed to compose the biggest contingent of Western jihadists in Syria. In fact, French Prime Minister Manuel Valls said in September some 1,000 French nationals are involved in jihadist networks. Some of those who had left to fight in Syria have already returned.

France was one of the first global nations to have responded to the call of the United States for the establishment of a coalition that will pound of the ISIS and its networks. It carried out its first air strikes on September 19th in Iraq. Six of its Rafale fighter jets are currently based in the United Arab Emirates, which reportedly destroyed four hangars near Fallujah city, west of Baghdad. It believed the hangars contained "likely" weapons and other equipment.

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