Australia's prime minister says his government plans to pass a law within weeks giving the government the right to strip citizenship of suspected terrorists who are not convicted and are also dual nationals.

Prime Minister Tony Abbott said on Tuesday that more than 100 Australians are suspected to be fighting with the Islamic State movement and other terrorist groups in Syria and Iraq. Up to 50 percent of the Australian foreign fighters are thought to be dual citizens.

Abbott says the government will have the discretion to revoke Australian citizenship from dual nationals suspected of terrorism, even if they have been not been convicted of any offense. The decision will be subject to judicial appeal.