Two people have been killed in Poland after dozens of missiles were launched at targets across Ukraine, unconfirmed reports say.
There has been no official confirmation of what happened close to the country’s border with Ukraine.
Poland’s Bureau of National Security is meeting in an emergency session.
Russia’s defence ministry said the reports amounted to a “deliberate provocation aimed at escalation.”
Russia launched one of its biggest barrages of missiles against Ukraine on Tuesday.
The capital Kyiv was among the cities hit, with officials saying at least one person was found dead.
Earlier, Russia faced stinging condemnation at the G20 summit in Bali, Indonesia.
Ukraine’s President Volodymyr Zelensky appeared via videolink, calling for the war to be stopped