Pictures of a father and son proudly posing with the decapitated head of a Syrian soldier were posted on Twitter.
The 7-year-old child who was pictured holding the decapitated head of a Syrian soldier is believed to be the son of Australia's most-wanted terrorist and jihadi fighter, Khaled Sharrouf.
The horrific picture was captioned "That's my boy."
Another picture showed Sharrouf holding the same decapitated head with the caption "What a head."
One photo showed the father and son together matching in camouflage outfits holding guns.
Sharrouf is wanted by Australian Federal Police for crimes committed in Syria and Iraq. He was already sentenced and served five years and three months jail time in the country for the 2005 Pendennis plot. He admitted to his crimes of possessing six clocks and 140 batteries in preparing for a terrorist act. He was also diagnosed with schizophrenia.
In 2013, he fled to Middle East using his brother's passport.
Around this period, he sent a terrorist threat to Australia through Fairfax Media. He said he had always "on the path they hate" since aged 19.
He was rebelling against the fact Jews were allowed to fight for the Israeli Defence Force while Muslims are banned from fighting in Syria or Iraq.
"They fight us and harm us we will retaliate we will dedicate our lives to your unrest. We r not mad men or dysfunctional as they portray us to be [sic]. By Allah, we are the sane. Anyone who sees what is happening to the muslims [sic] around the world . . . and sits back and does nothing, he is insane," Sharrouf wrote.
On Monday, Prime Minister Tony Abbott said that the pictures only proved how barbaric the terrorrists' act were.
"We see more and more evidence of just how barbaric this entity is. I believe there are more photographs in the newspapers in Australia today of the kind of hideous atrocities this group is capable of," Mr Abbott told ABC Radio.
Meanwhile, United Nation's Secretary General Ban Ki-moon has called on all Iraqi political parties to work together in the establishment of a new government that can effectively handle the ISIS.
According to a statement released Aug. 10 through his spokesperson, Ban is calling for political parties to abide by the constitutional timeline that governs the nomination of the Prime Minister.
The statement underlined that "reason and wisdom" shall prevail for all leaders in Iraq to establish "a broad-based government that is acceptable to all components of Iraqi society."