Iran is accusing the United States and Israel of waging a new round of cyberwarfare against its internal computer systems. The Iranian government says hackers have recently tried to disrupt computer networks in a southern province as well as in the national Culture Ministry. If confirmed, the hacking would be the latest major U.S.-Israeli cyber-effort against Iran to come to light since the operation that disrupted Iranian nuclear facilities and unleashed the global computer virus Stuxnet. The Obama administration’s cybercampaign in Iran is believed to be the first sustained effort by one country to destroy another’s infrastructure through computer attacks.