Two Australians are among a Kuwait-based Islamic State cell that was supplying money, fighters and weapons including surface-to-air missiles to the militant group, Kuwaiti authorities say. 
Kuwaiti media reported that the pair are on the run after their ringleader and five other members of the cell were arrested in Kuwait.
Hesham Mohammed Thahab and Rabia Thahab are described as "Lebanese-Australian nationals" who are now "at large abroad", the official Kuwait News Agency reported.
The Australian government says it is aware of the reports and is seeking further information from Kuwait, though it indicated that the pair might have been arrested.
"The Department of Foreign Affairs and Trade is seeking to confirm reports that two Australians have been arrested in Kuwait. The Australian Embassy in Kuwait is talking to Kuwaiti authorities," a department spokesperson said.
The cell was allegedly providing the Islamic State terror group with "recruiters, money, weaponry and logistical support", KUNA reported.
It said that the cell was led by Osama Khayat, a 45-year-old Lebanese national born in Kuwait.
Khayat had "confessed he has been in contact with the [Islamic State] group leaders in Syria and has made several arms deals for the main organisation, including deals for buying FN-6 missiles and weaponry from Ukraine".
While it is highly unlikely to be successful against Australian Hornet or Super Hornet fight jets, it could be used against helicopters such as US Apache gunships which are being used in Iraq.
Ringleader Khayat reportedly told investigators the weapons were being shipped to Turkey and then smuggled into Syria. He also admitted sending money to Islamic State through Turkish bank accounts.
Six of the 10 cell-members have been arrested, including a Syrian national who owned a Ukraine-based arms company, KUNA reported. The others were Syrian, Egyptian and Kuwaiti.
The KUNA report does not detail what the Australians' involvement was.
Meanwhile, Immigration Minister Peter Dutton said on Friday that 199 passengers have been offloaded from international flights by counter-terrorism officers since   July, marking a significant increase in interventions.
In the 2014-15 financial year there were 336 such interventions.
The passengers were offloaded for national security reasons, concerns about their intended travel destination or other suspicious behaviour.
"Maintaining strong security at borders is critical in stopping those with evil intent or people who have fallen prey to propaganda from leaving Australia to join murderous terror groups like Islamic State," Mr Dutton said.