The U.S. Coast Guard tracked Russian naval vessels, including two submarines, crossing into the U.S. Exclusive Economic Zone off Alaska, likely avoiding sea ice.

The encounter, involving a frigate and tugboat, occurred 30 miles inside U.S. waters but complied with international maritime rules.

The Coast Guard Cutter Stratton monitored the situation, ensuring no disruptions to U.S. interests, CBS News has reported.

This follows recent similar encounters, including joint Russian and Chinese military aircraft entering the Alaska Air Defense Identification Zone, marking increased military activity and cooperation in the Arctic.

U.S. officials are concerned about the growing presence of foreign powers in the region.

Written by B.C. Begley