The U.S. government on Tuesday issued a rare alert squarely blaming the North Korean government for a raft of cyberattacks stretching back to 2009 and warning that more were likely.

The joint alert from the U.S. Department of Homeland Security and the Federal Bureau of Investigation said that "cyber actors of the North Korean government," referred to in the report as "Hidden Cobra," had targeted the media, aerospace and financial sectors, as well as critical infrastructure, in the United States and globally.

The new level of detail about the U.S. government's analysis of suspected North Korean hacking activity comes as tensions continue to escalate between Washington and the reclusive country due to Pyongyang's continued missile testing. The alert warned that North Korea would continue to rely on cyber operations to advance its military and strategic objectives.