The Operational Command of Poland's Armed Forces said it had deployed "all necessary forces and resources at its disposal" to ensure the safety of Polish airspace and was "monitoring the situation on an ongoing basis."
Polish and allied aircraft were activated in the morning, the Operational Command said in a statement, adding that measures were taken to ensure security in areas near the Ukrainian border.
The Polish Air Navigation Services Agency (PANSA) said civilian airports in the cities of Rzeszów and Lublin were temporarily closed to allow military aircraft to operate freely in response to the Russian strikes on western Ukraine.
The two airports resumed operations around 7 a.m., state news agency PAP reported.
At about 8:30 a.m., the Operational Command said the threat of Russian missile strikes on regions bordering Poland had decreased and that Polish and allied aircraft were returning to base.
It reported no violations of Polish airspace during the attacks.
"We thank NATO Air Command and the German Air Force, whose aircraft helped ensure security in Polish skies today," the Operational Command said.
It also thanked the Dutch armed forces "for their support with the air defence systems."
Russia launched a fresh wave of missile and drone strikes on Ukraine overnight into Tuesday, targeting energy infrastructure across the country, according to Ukrainian officials.
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Source: IAR, PAP, polskieradio24.pl, Ukrinform