The Obama administration on Friday said it was “confident” Russia was behind the hacking of the Democratic National Committee and associated entities, saying the scale of the hacking indicated a level of sophistication that pointed to the government.

“The U.S. Intelligence Community is confident that the Russian government directed the recent compromises of emails from U.S. persons and institutions, including from U.S political organizations,” said a joint statement issued by the Department of Homeland Security and the Office of the Director of National Intelligence.