Hackers traced to a server in China have stolen the floor plans for the new Australia Security Intelligence Organisation, according to a local report.
The cyber attack came from a server traced to China, Australian media reported Monday.
Foreign Minister Bob Carr said the attack would not damage Canberra's ties with Beijing.
Previous cyber attacks forced late design changes to the $600 million building.
China's Foreign Ministry rejected the allegations saying "groundless accusations" would not solve cyber security issues.
Hackers were also reported to have stolen confidential information from the Department of Foreign Affairs and Trade, home to the country's foreign intelligence agency.