WRAPUP 13-Blast kills two in Poland near Ukraine border, Russia denies its weapons involved

(Adds NATO member states' comment, context)

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U.S. investigates unconfirmed reports of stray Russian missiles

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Reports in Poland, a NATO member, raise alarm

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Russia: no strikes with its weapons near Ukrainian-Polish border

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Ukraine suffers heaviest Russian missile volley of war

By Marek Strzelecki and Dan Peleschuk

WARSAW/KYIV, Ukraine, Nov 15 (Reuters) - Two people died in an explosion in a Polish village near the border with Ukraine on Tuesday, firefighters said, with NATO allies investigating unconfirmed reports the blast was caused by stray Russian missiles.

The explosion occurred after Russia hammered cities across Ukraine with missiles on Tuesday, attacks that Kyiv said were the heaviest wave of strikes nearly nine months into the Russian invasion. Some hit the western city of Lviv, less than 80 km (49.7 miles) from the border with Poland.

Poland is a member of the U.S.-led Western military alliance NATO, which is committed to collective defence, and the possibility that the Polish explosion resulted from an intentional or accidental Russian strike raised alarm.

A NATO official said the alliance was looking into the reports and closely coordinating with Poland.

The Associated Press cited a senior U.S. intelligence official as saying the blast in the eastern Polish village of Przewodow was caused by Russian missiles crossing into Poland.

In Washington, the Pentagon and the U.S. State Department said they could not confirm Russian missiles had landed on Polish territory.

"We are aware of the press reports alleging that two Russian missiles have struck a location inside Poland near the Ukraine border. I can tell you that we don't have any information at this time to corroborate those reports and are looking into this further," Pentagon spokesperson Brigadier General Patrick Ryder said.

Russia's defence ministry denied reports that Russian missiles had landed in Poland, describing them as "a deliberate provocation aimed at escalating the situation".

Polish Prime Minister Mateusz Morawiecki called an urgent meeting of a government committee for national security and defence affairs on Tuesday night, government spokesman Piotr Muller said on Twitter.

Polish Radio ZET reported that two stray missiles hit Przewodow, killing two people, without elaborating. The village is 6 km (3.5 miles) from the border with Ukraine.

Ukrainian President Volodymyr Zelenskiy said, without providing evidence, that "Russian missiles hit Poland."

Senior officials from Germany, Norway, Lithuania and Estonia - all NATO members - said they were trying to glean more information together with Poland and other allies.