A Russian missile barrage early Sunday left three people wounded and ignited several fires across Kyiv, according to Ukrainian authorities. The capital's military administration and Mayor Vitali Klitschko confirmed the strike, which triggered citywide alarms and sent residents rushing to shelters in the dead of night.

The entire country was placed on high alert around 2 a.m. GMT, after Ukraine’s air force issued a warning about an incoming large-scale attack. The alert extended to western regions bordering Poland, a NATO member state that responded by scrambling fighter jets as a precautionary measure to maintain airspace security.

“Remain in shelters!” Klitschko urged citizens in a message during the assault. Eyewitnesses reported hearing multiple explosions throughout the capital, describing them as sounding like interceptions by air defense systems. Authorities have yet to release the full scale of the damage or provide further information on the nature of the missile strike.

So far, there have been no confirmed reports of damage or strikes in Ukraine’s western territories adjacent to Poland. However, Polish defenses remain on standby, reflecting lingering tensions since a stray Ukrainian missile killed two civilians in the Polish village of Przewodow in 2022. Poland has since routinely mobilized its air force when Russian missiles are detected near its border.

The attack on Kyiv followed an earlier strike on Mykolaiv, in southern Ukraine, where three people were also injured. Just a day prior, a Russian missile strike on Kryvyi Rih resulted in the deaths of 19 civilians, including nine children, in one of the war’s most tragic recent incidents.

There has been no immediate response from Moscow regarding Sunday’s events. Both Russian and Ukrainian authorities continue to deny deliberately targeting civilians, despite the thousands of non-combatant casualties—the vast majority Ukrainian—since Russia launched its full-scale invasion over three years ago.

Meanwhile, U.S. President Donald Trump, who assumed office in January vowing to end the war within 24 hours, has positioned himself as a potential mediator. Late last month, Washington announced that two ceasefire frameworks had been tentatively agreed upon by Ukraine, Russia, and the U.S., including one aimed at protecting energy infrastructure from further military escalation.