The Republican leader of the U.S. Senate said on Monday the chamber could begin work this month on a bill imposing stiff sanctions on Russia - and secondary sanctions on countries that trade with Russia - over its war in Ukraine.

President Volodymyr Zelensky on June 2 called on U.S. President Donald Trump to deliver a "strong new package" of sanctions against Russia if ongoing peace talks in Istanbul fail to bring results. Speaking at a joint summit of the Bucharest Nine and Nordic leaders in Vilnius,