The missile that hit Poland was fired by Ukrainian forces against a Russian missile headed their way, according to initial reports, Associated Press reported citing US officials. 

Earlier, Poland foreign ministry said in a statement that the missile fired at the country was of Russian-make. Poland President Andrzej Duda was more cautious and said that it was “most probably” Russian-made, but the origins were still being verified. 

A missile landing on Poland’s eastern border along Ukraine led to two people getting killed early Wednesday. Ukraine President Volodymyr Zelensky called it “a very significant escalation”, while United States President Joe Biden said it is “unlikely” that the missile was fired from Russia. 

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Russia said Wednesday that the explosion in Polish territory was caused by a Ukrainian air defence missile. 

The North Atlantic Treaty Organization (NATO) is in emergency talks. Poland is a member of NATO and an attack on a NATO member state means the counterattack will be from all NATO members, including the United States. 

Rishi Sunak, the British Prime Minister, said UK and its member nations are still trying to establish the facts about the missile which hit Polish territory. 

“All of us want to get to the bottom of what happened,” Sunak told a press conference at the G20 summit.

Slovak Prime Minister Eduard Heger said NATO is likely to discuss a plan to strengthen eastern air defences. 

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German Chancellor Olaf Scholz said the missile blast in eastern Poland, in which two people were killed, must be fully investigated before conclusions are drawn. 

Meanwhile, a Ukrainian official said the blame for the missile incident lies with Russia. 

Reports that Russia was not behind the missile attack has brought a degree of stability across the world. If Russia had deliberately targeted Poland, it would risk drawing the 30-member conflict at a time when it is struggling to fight Ukraine. 

This is a developing story. More details will be added.