Extremists are training young Australians to be the next generation of suicide bombers.
The situation in Iraq and Syria became all the more alluring for young Australians that they are willing to be groomed as new suicide bombers, ASIO boss David Irvine told the National Press Club on Wednesday.
"We have seen the training of young people over there (Iraq and Syria) to be suicide bombers. The process of recruitment, which I also think is grooming, is occurring here," Irvine said.
The threat of home-grown terrorists was once again reiterated by Foreign Minister Julie Bishop.
She said that a significant number of Australians had already achieved leadership roles within the organisation.
There are 60 Australians who are currently fighting with terrorists in Syria and Iraq and 100 more people based in Australia who are supporting these fighters.
With this, she is calling other nations, including Arab countries, to build a coalition of support to combat home grown terrorists.
"We do have a significant number of Australian citizens who are taking leadership roles within the Islamic State terrorist organisation and this is a particularly brutal, barbaric organisation. We want to build a coalition of support to stop this kind of terrorist activity," Bishop told ABC Radio.
On Monday, a suspected Australian terrorist was asked to leave a Middle Eastern airline at Melbourne Airport.
The Border Force officials suspected that he was leaving the country to join a jihadi group in Syria.
The man who was later found to be from Melbourne is an Australian citizen.
He was about to fly to Beirut in Lebanon with three of his family members. However, the Australian Federal Police officers discovered he was carrying cash amounting to $30,000. He had also with him materials related to terrorism such as photos of beheadings, images of the infamous flag used by ISIS.
His family members told police that they do not know about his plans of joining the fight. However, they also decided not to continue with their travel anymore.
The man was later freed by police after a thorough interrogation. He was released back into the community but under constant investigation and surveillance.
In a separate incident, another man was also arrested at Sydney International Airport on Sunday. He was also trying to fly to Syria and had with him materials related to terrorism.