The Associated Press cited a senior U.S. intelligence official as saying the blast was due to Russian missiles crossing into Poland. However, the Pentagon said on Tuesday it could not confirm reports that Russian missiles had crossed into Poland.
That strike at the Pivdennoukrainsk (South Ukraine) nuclear station and fresh shelling near the Zaporizhzhia station, Europe's largest such facility, prompted new fears of a nuclear accident during the war, Ukrainian officials said.
Ukraine and Russia have traded accusations over multiple recent incidents of shelling at the Zaporizhzhia facility, Europe's largest nuclear power plant. Russian troops captured the station early in the war.