Hungary accused Ukraine of an "outrageous and unacceptable" attack that disabled a Russian oil pipeline supplying the NATO ally—and fired a warning to Kyiv about its reliance on Hungarian electricity supplies. Newsweek has contacted the Ukrainian foreign ministry for comment.

Ahead of the summit with Ukrainian President Volodymyr Zelenskyy and other European leaders in Washington on Monday, President Donald Trump said Ukraine should give up efforts for NATO membership and Russian-annexed Crimea.

Donald Trump has said that meetings with European leaders could pave the way for three-way talks between the leaders of Ukraine, Russia and the US amid his drive to end the fighting in eastern Europe.