The Ukrainian defense and security secretary was cited as saying that "it would be beneficial" for Kiev if Washington lifted the ban. Lytvynenko has also reportedly said that the chances for a possible Ukrainian breakthrough on the battlefield this year were "slim."
"As long as we hold the line, as long as we fight ... we still have all chances to win," he told the newspaper, adding that "our task right now is to tip the scale."
A week ago, Politico reported, citing officials familiar with the matter, that Kiev was pressing US President Joe Biden's administration to lift the ban on using the US-supplied weapons to strike inside Russia amid the advance of the Russian armed forces in the region of Kharkov, also known as Kharkiv.
Late last week, Volodymyr Zelensky said that the advance of Russian troops in the Kharkov region may be the "first wave" in a wider offensive, adding that Ukraine lacked air defense systems and needed more troops to hold the front line.