No return for terror suspects: Abbott

Prime Minister Tony Abbott says anyone who supports Islamic State by fighting overseas won't be returning to Australia.

The PM says anyone who supports Islamic State by fighting overseas won't be returning to Australia. (AAP)

Any dual nationals who go overseas to fight with Islamic State won't be allowed to return to Australia.

Prime Minister Tony Abbott said the government's citizenship law changes to be brought to parliament in the next fortnight would be based on a simple premise.

"As far as is reasonably possible, if someone leaves this country to fight with a terrorist army in the Middle East, they aren't coming back ... they have committed the modern form of treason," he told parliament on Monday.