Different variants of Stuxnet targeted five Iranian organizations,[98] with the probable target widely suspected to be uranium enrichment infrastructure in Iran;[2][99][100] Symantec noted in August 2010 that 60% of the infected computers worldwide were in Iran.[101] Siemens stated that the worm has not caused any damage to its customers,[102] but the Iran nuclear program, which uses embargoed Siemens equipment procured secretly, has been damaged by Stuxnet.[103][104] Kaspersky Lab concluded that the sophisticated attack could only have been conducted "with nation-state support".[105] This was further supported by the F-Secure's chief researcher Mikko Hyppönen who commented in a Stuxnet FAQ, "That's what it would look like, yes".[106]