Ukrainian President Volodymyr Zelensky thanked European Union leaders for their support in Brussels, according to BBC reporting.
He delivered his remarks alongside European Commission President Ursula von der Leyen and European Council President António Costa.
Zelensky praised the heads of state and government gathered there as he sought continued backing for Ukraine.
His comments came as US President Donald Trump criticized Ukraine's renewed attacks on Russian oil refineries.
Trump described the renewed attacks as a disgrace, the BBC reported.
The source did not provide further details about the circumstances of his statement or any additional measures he intended to take.
The developments highlight disagreements over Kyiv's military strategy as relations with Washington face renewed strain.
Ongoing Attacks and Winter Preparations
The developments come as Ukraine continues to face Russian attacks and prepares for another cold winter.
The BBC reported that a Kyiv resident had moved away from locations she considered potential Russian targets as the country braced for further assaults.
BBC Ukraine correspondent Dan Johnson reported from near Kyiv's Northern Bridge, which had been struck for the second consecutive day.
Separately, BBC correspondent Paul Adams reported from the scene of a Russian drone strike on Ukraine's National Academy of Sciences building in Kyiv.
The continuing attacks underscore the security challenges facing Ukraine as its government seeks international support.
European leaders' backing remains a central issue in the country's diplomatic efforts, while Trump's criticism highlights tensions between Kyiv and Washington over military operations against Russian infrastructure.
