Leaders from the Group of Seven nations as well as Spain and the Netherlands, who are all on the Indonesian island of Bali for the G20 summit, held an emergency meeting in response to the missile strike in Poland.
The G20 leaders' meeting on Wednesday will be important to raise their awareness of the war in Ukraine, French President Emmanuel Macron's office said on Tuesday after reports of the blasts in Poland.
G20 leaders were due to visit a site in Bali to plant mangroves on Wednesday morning, although the schedule of the meeting hosted by Indonesia has not always run to plan.
As at other recent international forums, the United States and its allies were seeking a statement from the G20 summit against Moscow's military actions.
A 16-page draft declaration seen by Reuters, which diplomats said was yet to be adopted by leaders, acknowledged the rift over the Ukraine war.