Kirby called North Korea's arms transfer to Russia a "significant and concerning escalation" and said the United States would impose additional sanctions against those facilitating the arms deals.
"Our information indicates that the Democratic People's Republic of Korea recently provided Russia with ballistic missile launchers and several ballistic missiles," said Kirby, using the official name of North Korea.
In recent days, he said, "Russian forces launched at least one of these North Korean ballistic missiles into Ukraine," adding that it appeared to have landed in open field.
