European leaders backed Ukraine's President Volodymyr Zelenskyy after a White House showdown with US President Donald Trump that has cast doubts on efforts to end the Russia-Ukraine war.
Russia backed Trump, who openly berated Zelenskyy on Friday and accused him of having "disrespected" the United States.
Here are some key reactions from around the world. Zelenskyy has thanked dozens of allies on social media for their "support".
British Prime Minister Keir Starmer, who met Trump this week, vowed "unwavering support" for Ukraine and spoke to both Trump and Zelenskyy following their meeting.
Starmer "is doing all he can to find a path forward to a lasting peace based on sovereignty and security for Ukraine", a Downing Street spokesperson said.
European Union chiefs Antonio Costa and Ursula von der Leyen assured Zelenskyy in a joint statement that he was "never alone."
"We will continue working with you for a just and lasting peace," they said.
The bloc's top diplomat, Kaja Kallas, said: "The free world needs a new leader. It's up to us, Europeans, to take this challenge."
French President Emmanuel Macron said: "There is an aggressor, which is Russia. There is an aggressed people, which is Ukraine." He added: "We were all right to help Ukraine and sanction Russia three years ago and to continue to do so."
German Foreign Minister Annalena Baerbock said the "unspeakable" row "underlined that a new age of infamy has begun."
Friedrich Merz, likely to become the country's next chancellor, said: "We must never confuse the aggressor and the victim in this terrible war," while outgoing head of state Olaf Scholz also backed Ukraine.
By contrast, Hungarian Prime Minister Viktor Orban, a close ally of Trump's and Putin's, praised the US leader for standing "bravely for peace."
"Strong men make peace. Weak men make war," Orban posted on X.
Italian Prime Minister Giorgia Meloni called for the United States, Europe and their allies to hold talks on the Ukraine war.
"A summit without delay is needed to talk frankly about how we intend to tackle today's major challenges, starting with Ukraine, which together we have defended in recent years."
"Dutch support for Ukraine remains undiminished. Especially now," Prime Minister Dick Schoof said on X, adding: "We want lasting peace and an end to the war of aggression that Russia has started."
"Dear Ukrainian friends, you are not alone," staunch Kyiv ally Polish Prime Minister Donald Tusk said on X.
Spanish Prime Minister Pedro Sanchez, who pledged one billion euros ($1.038 billion) in aid this week, said: "Ukraine, Spain stands with you."
Russian foreign ministry spokeswoman Maria Zakharova said Zelenskyy's visit to the White House had been "a complete political and diplomatic failure", accusing Zelenskyy of being "obsessed with continuing" the fighting.
Ukrainian Prime Minister Denys Shmygal said Zelenskyy was "right" because "peace without guarantees is not possible".
"Ceasefire without guarantees is the way to Russian occupation of the entire European continent," Shmygal said.
Army chief Oleksandr Syrsky, who rarely makes political statements, said the armed forces stood behind Zelenskyy, while calling for unity.
Senate Democrats accused Trump and Vice President JD Vance of siding with Putin.
"Trump and Vance are doing Putin's dirty work," Democratic Senate minority leader Chuck Schumer posted on social media.
Other Ukrainian allies also rallied behind Zelenskyy. Canada said Kyiv was not only fighting for its freedom but also "ours."
Denmark described its "pride" in supporting Ukraine while Sweden referred to Ukrainians as "friends."
Swiss President Karin Keller-Sutter said her country was "firmly committed to supporting a just and lasting peace, while condemning Russia's aggression against a sovereign state."
Australian Prime Minister Anthony Albanese said his country would "stand with Ukraine," while New Zealand Prime Minister Christopher Luxon praised Ukraine as "a proud, democratic and sovereign nation".
Japanese Prime Minister Shigeru Ishiba called the heated exchange between Trump and Zelenskyy "unexpected" and "emotional."
"Diplomacy backed by compassion and patience should be developed in the future to realise peace," he said.