China and Australia inked treaties on extradition and the transfer of sentenced persons in Sydney on Thursday to strengthen their international crime cooperation.

The Treaty on Extradition between the People's Republic of China and Australia, and the Treaty between the People's Republic of China and Australia Concerning Transfer of Sentenced Persons were jointly signed by China's Minister of Foreign Affairs Yang Jiechi and Australia's Attorney-General Philip Ruddock.

The two treaties will ensure that China and Australia are in a strong position to effectively combat domestic and trans-national crime and that neither country becomes a safe haven for fugitive criminals, said a press release issued by the Australian Attorney-General's office.

The two countries signed the Mutual Legal Assistance in Criminal Matters Treaty, which came into force in March 2007.

The two treaties were sealed on the sidelines of the ongoing Asia-Pacific Economic Cooperation Leaders' Week which kicked off here on Sept. 2.