U.S. President Joe Biden announced a new $375 million package of military aid to Ukraine on Sunday and told President Volodymyr Zelenskiy that the United States was doing all it could to strengthen Ukraine's defense for the war with Russia.
Western countries will run "colossal risks" if they supply Ukraine with F-16 fighter jets, TASS news agency quoted Russian Deputy Foreign Minister Alexander Grushko as saying on Saturday.
Russian mercenary chief Yevgeny Prigozhin said on Saturday that his Wagner fighters had completed the capture of the Ukrainian city of Bakhmut after months of intense fighting, a claim denied by Ukraine.
U.S. President Joe Biden on Sunday said he had received a "flat assurance" from Ukrainian President Volodymyr Zelenskiy that he would not use Western-provided F-16 fighter jets to go into Russian territory.
Ukrainian forces have partly encircled the besieged eastern city of Bakhmut along the flanks and still control a part of the city, Deputy Defence Minister Hanna Maliar said on Sunday.