Pentagon spokesman Brig. Gen. Pat Ryder could not immediately confirm if the explosions were the result of Russian missile strikes but said the Defense Department was looking to confirm the reports.
"We are aware of the press reporting on this. We have no information at this time to corroborate those reports, but again, we are taking them seriously and looking into them," Ryder told reporters at the Pentagon.
"I don't want to speculate or get into hypotheticals. When it comes to our security commitments, and Article Five, we've been crystal clear that we will defend every inch of NATO territory," he added, referring to NATO's collective defense principle.
The reported attacks that hit Poland's eastern village of Przewodow come as Ukraine faces a wave of missile strikes that have again targeted the war-torn country's energy infrastructure, knocking power out for millions of people. Some Russian strikes hit targets in the western part of the country close to the border with Poland.
Polish Prime Minister Mateusz Morawiecki has convened an urgent high-level meeting to discuss the matter, government spokesman Piotr Muller said shortly after reports of the explosion began.
Source: Anadolu Agency