The International Atomic Energy Agency on Tuesday said in recent months malware had contaminated some of its computers but that no sensitive data had been impacted, Reuters reported.
The infected computers were located at the Vienna International Centre -- a shared area at IAEA headquarters where agency personnel and officials from member nations gather and work. The U.N. nuclear watchdog did not say who or what might be responsible for the malicious software.
This is not the first time the International Atomic Energy Agency has been the target of malicious cyber codes. A hacker website in 2012 published the contact information for experts working with the nuclear agency that it had illicitly copied from a former IAEA computer server. The hackers were calling for an international investigation of Israel's atomic program, which is widely assumed to include nuclear-weapons work.
"Data from a number of Vienna International Centre visitors' USB drives [data memory sticks] is believed to have been compromised," IAEA spokesman Serge Gas said in a Tuesday e-mail.
"The [IAEA] secretariat does not believe that the USB devices themselves were infected or that they could spread the malware further," the spokesman continued. "No data from the IAEA network has been affected."
All appropriate steps are being implemented to resolve the incident, he said.
The agency's responsibilities include supervising member nations' atomic facilities to help prevent the diversion of material for military use.