Microsoft recently accused hacking groups from Russia, China, and Iran of targeting hundreds of organizations tied to the upcoming U.S. election, and other security experts see the same trends.

Three hacking groups, one each from Russia, China, and Iran, have initiated cyberattacks against many organizations, including the presidential campaigns of Donald Trump and Joe Biden, Tom Burt, Microsoft’s corporate vice president for customer security and trust, wrote in a Sept. 10 blog post.