A "massive attack" launched by Russia on Ukraine’s capital has resulted in the deaths of at least four people and injuries to at least 27 others, according to Ukrainian officials.

Multiple regions were struck overnight by drones, including Zaporizhzhia, where local authorities reported that at least 16 individuals, among them three children, were wounded.

Ukraine's foreign minister stated that the latest wave of strikes involved hundreds of drones and missiles across the country. Russia has not issued any official response.

On Saturday, Ukrainian President Volodymyr Zelensky cautioned that Russia’s aggression would not be limited to Ukraine, claiming Moscow was testing the defenses of European nations through recent airspace violations involving Nato members.

Russian President Vladimir Putin began the full-scale invasion of Ukraine in February 2022 and has continuously resisted international peace efforts led by U.S. President Donald Trump to resolve the conflict.

"Putin will not wait to finish his war in Ukraine. He will open up some other direction. Nobody knows where. He wants that," Zelensky said.

Zelensky made the remarks just hours before the most recent wave of Russian attacks targeted Ukrainian cities. Further information about the strikes is still coming in.

Meanwhile, Poland reported that fighter jets were deployed early Sunday as Russia carried out strikes in western Ukraine, according to the Polish armed forces.

The Polish military described these measures which have become increasingly common since three Russian drones entered Polish airspace and were shot down by Polish and Nato aircraft on 10 September as precautionary steps.

In a separate incident, Denmark claimed that drones were spotted flying over its airports. While Moscow has denied involvement, Danish authorities described the operation as appearing to be conducted by a "professional actor," though they did not attribute it to any specific party.

Estonia, too, has accused Russia of violating its airspace with military aircraft.

Following these events, Nato initiated operations aimed at strengthening its eastern defenses.

Former U.S. President Donald Trump has suggested that Nato members should actively shoot down Russian aircraft if they breach their airspace.

Trump also recently revised his stance on the war, stating for the first time that Ukraine could potentially reclaim all of its occupied territory.

During a speech at the UN General Assembly on Saturday, Russian Foreign Minister Sergei Lavrov insisted that Russia had no plans to target EU or Nato countries. However, he warned of a "decisive response" to any form of "aggression" directed at Moscow.