MADRID, June 29 - NATO declared Russia the “most significant and direct threat” to its members’ peace and security on Wednesday and vowed to strengthen support for Ukraine, even as that country’s leader chided the alliance for not doing more to help it defeat Moscow, The Associated Press reported.

The military organization’s condemnation was not wholly surprising: Its chief earlier said Russia’s war in Ukraine had created Europe’s biggest security crisis since World War II. But it was a sobering about-face for an alliance that a decade ago called Moscow a strategic partner.