US Secretary of State Antony Blinken said he urged his Russian counterpart Sergei Lavrov to end the war in Ukraine during a brief, unscheduled meeting that was the first since Moscow's invasion.

"I told the foreign minister what I and so many others said last week at the United Nations and what so many G20 foreign ministers said today -- end this war of aggression, engage in meaningful diplomacy that can produce a just and lasting peace," Blinken told reporters after talks in New Delhi.