North Korea said it tested a new intercontinental ballistic missile on Thursday, describing the weapon as capable of reaching the U.S. mainland. The announcement came through state media after the launch, which marks another step in the country’s push to expand its long-range missile arsenal.

The test is likely to deepen concerns among regional governments and Washington over Pyongyang’s nuclear and missile program. Long-range missile launches from North Korea have repeatedly triggered criticism and calls for tighter sanctions and stronger deterrence measures.

Analysts and officials will now be watching for signs of how far the new missile advances North Korea’s existing capabilities, and whether the test prompts a new round of diplomatic or military responses. The launch adds to tensions in an already volatile security environment in East Asia.