THE grandfather of a boy pictured holding up the severed head of a Syrian soldier has begged the government to help bring the seven-year-old and his siblings home.

“I’m scared for the children,” truck driver Peter Nettleton said at his Panania home last night.

“What life are they going to have now?”

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Mr Nettleton thought his jihadist son-in-law Khaled Sharrouf and daughter Tara had taken her five children, two girls and three boys, to Malaysia to stay with Sharrouf’s sister while he fought in Syria.

media_camera Khaled Sharrouf and his children. Picture: Supplied

Now the shocking photo Sharrouf posted on Twitter shows he has taken his family into the war zone. “Can’t the government do something to pull these kids away from that man?” he asked.

Mr Nettleton, who has been estranged from his daughter for nine years, said he heard about the shocking photo while listening to the news on radio yesterday.

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“That brought me to tears because I don’t know how to handle it,” he said. Mr Nettleton, who has remarried and has three daughters, said Tara cut off contact with him after she married her teenage sweetheart Sharrouf and converted to Islam.

“We made a decision a long time ago to part,” he said.

media_camera Khaled Sharrouf’s son holds the decapitated head of a soldier in the Syrian city of Raqqa. Picture: Supplied

“She made that decision easily. I don’t know her boys. I don’t know their names.”

Tara met Sharrouf while they were students at Chester Hill High School and had their first child, a girl, when she was 17.

“She just went with him and converted, she never grew up religious, we weren’t religious,” Mr Nettleton said.

Despite shocking evidence that his grandchildren are with their Islamist fighter father, Mr Nettleton was still not sure if his daughter was with her husband.

Sharrouf, a convicted terrorist, snuck out of Australia late last year using his brother’s passport.

media_camera Khaled Sharrouf. Picture: Supplied

Mr Nettleton said he believed his daughter left Australia with the children at the same time: “Tara’s mother told me she went to Malaysia after Khaled left to stay with Khaled’s sister. She told her mother she would be coming back within the month.”

Mr Nettleton said his ex-wife Karen remained close to her daughter.

Ms Nettleton would not answer the door of her Peakhurst home yesterday. “I don’t want to say anything,” she called in a quavering voice.

Khaled Sharrouf’s sister-in-law also refused to speak to The Daily Telegraph.

The Sharroufs still living in Sydney have become reclusive in the months since Khaled’s shocking jihad came to light.

Neighbour Joel, who said he would be moving from the area after learning about the extremist family, told The Daily Telegraph once-regular visitors had dried up.