He told reporters Thursday that the INF treaty "is a landmark agreement that helped stabilize Europe and end the Cold War" and its end "will likely heighten, not reduce, the threat posed by ballistic missiles."
In February, the U.S. began withdrawing from the treaty, accusing Russia of developing missiles that do not comply with the pact. Russia has until Friday to destroy those missiles. Guterres urged the two nations "to avoid destabilizing developments" and agree on a new arms control path. He said they should extend the New START treaty, the last major U.S.-Russia arms control pact, which expires in 2021.