Russian President Vladimir Putin is "failing in Ukraine" amid Kyiv's successes on the battlefield, according to NATO Secretary General Jens Stoltenberg.
Stoltenberg said Putin was "trying to use winter as a weapon of war," as Russia's spate of strikes on Ukrainian critical infrastructure have left millions of civilians without electricity, water and central heating.
NATO allies have delivered generators to help Ukraine restore its collapsed energy infrastructure, Stoltenberg said ahead of a NATO foreign ministers' meeting in Bucharest, Romania, on Tuesday.
He added that he expected the message from the foreign ministers to be that allies "need to do more," including providing Ukraine with more air defense systems and ammunition.
Asked whether Ukraine could expect to see further attacks from Russia, Stoltenberg said more attacks could be expected because: "Russia is failing on the battlefield."
Ukraine’s success in pushing Russian forces out of territories around Kyiv and Kharkiv, as well as the liberation of Kherson city, was "a sign of weakness," he added.
Stoltenberg said Russia was running out of ammunition, evidenced by its reaching out to Iran for more.
"Iran and no other country should provide Russia with missiles, drones or anything else,” he warned.
When asked about the possibility of Ukraine joining NATO, Stoltenberg said he anticipated the foreign ministers' meeting would "reiterate that NATO’s door is open."