Polish and other NATO jets scrambled on September 20 as Russia launched another massive drone and missile attack on Ukraine.

The wave of overnight strikes came shortly after NATO countries voiced outrage at a Russian incursion intoEstonianairspace the previous day, as well as recent Russian drone incursions into Poland andRomania.

"Polish and allied aircraft are operating in our airspace, while ground-based air defense and radar reconnaissance systems have been brought to the highest state of readiness," Polands militaryOperational Commandsaid in a post on X.

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The operation, which lasted around 90 minutes, underlined the heightened state of alert in NATO countries following the Russian incursions.

The Russian attacks on Ukraine included 579 drones, 32 cruise missiles, and 8 ballistic missiles, Ukraines air force reported.

Ukrainian President Volodymyr Zelenskyy said three people were killed and dozens injured.

"The enemy's target was our infrastructure, residential areas, and civilian enterprises. In Dnipro, a direct hit of a rocket with cluster munitions on a high-rise building was recorded, he said.

Zelenskyy repeatedcalls madefollowing the September 9drone incursionsfor NATO to work with Ukraine on joint air defenses. For a reliable shield we must act together, he said.

NATO on September 12said it had launcheda new "activity," dubbed Eastern Sentry, that would deploy additional military hardware from Britain, Denmark, France, and Germany to countries on its eastern flank.

But the alliance has resisted calls for an air umbrella within Ukraine.

The site of a Russian strike on a residential building in Dnipro on September 20

The head of the Dnipropetrovsk region, Serhiy Lysak, said there were 26 victims in the eastern city of Dnipro.

Fourteen are in the hospital, the rest will recover at home. A 55-year-old man is in serious condition. He has burns on 70 percent of his body. Doctors are fighting for his life," he said.

The Ukrainian Air Force said air defenses had intercepted the vast majority of incoming fire, highlighting the use of US-made F-16 jets against Russian cruise missiles.

Meanwhile, the Russian Defense Ministry said the countrys air defenses had shot down 149 Ukrainian drones overnight, in a variety of locations including the Rostov, Saratov, Bryansk, and Samara regions, and over Russian-occupied Crimea.

Battlefield claims by either side could not be independently confirmed.

The head of the Saratov region, Roman Busargin, wrote on Telegram that windows were blown out of two housing blocks and one woman was hospitalized. Video on social media appeared to show Ukraine hadhit an oil refineryin the region.

While Russia regularly targets civilian infrastructure including housing, hospitals, and schools, Ukraine has waged a targeted campaign against Russias oil refineries, reportedly taking out nearlya fifth of Russias capacity.

Ukraines military said it had struck oil facilities in both the Saratov and Samara regions, near Kazakhstan.