According to a report by Reuters cited by Reference News, explosions occurred in Kyiv, the capital of Ukraine, and other cities, prompting neighboring Poland to urgently deploy its air force early in the morning.

Ukraine and Poland have stated that Russia is launching missile attacks. Poland has indicated that it has "activated all available troops and resources, with on-duty fighter jets scrambled and ground-based air defense and radar reconnaissance systems placed on the highest alert."

According to Reference News, witnesses told Reuters that explosions were heard in the southeastern Ukrainian city of Zaporizhzhia and the Black Sea port city of Odessa. The Ukrainian Air Force issued a nationwide air raid alert. The scale of the attack remains unclear.