UNITED NATIONS, United States - A senior UN official condemned Russia on Friday for its "appalling assaults" on Ukraine involving some 158 missiles and drones, which Kyiv blamed for the deaths of at least 30 people.

Smoke rises following missile strikes in Lviv, western Ukraine, on December 29, 2023, amid the Russian invasion of Ukraine.
Russia launched drone and missile strikes across Ukraine on December 29, 2023, killing at least 18 people and wounding over a hundred in one of the most massive air attacks of the war. (Photo by YURIY DYACHYSHYN / AFP)

Schools, a maternity hospital, shopping arcades and blocks of flats were among the buildings hit in the nationwide barrage that also wounded over 160 people, said Ukrainian officials.

"Regrettably, today's appalling assaults were only the latest in a series of escalating attacks by the Russian Federation," said UN assistant secretary-general Mohamed Khiari at a UN Security Council meeting.

"The (UN) Secretary-General unequivocally condemns, in the strongest possible terms, today's appalling attacks on cities and towns across Ukraine.

"Attacks against civilians and civilian infrastructure violate international humanitarian law, are unacceptable and must stop immediately."

The attacks -- which also saw a Russian missile passing through Polish airspace -- triggered international condemnation and fresh promises of military support to Ukraine, which has been fighting off invading Russian troops since late February 2022.

"We have recorded a serious incident of violation of the Polish airspace by a Russian missile. The event is under investigation now by the Polish military and competent security services," said Poland's ambassador to the UN Krzysztof Szczerski.

Russia's ambassador to the UN Vasily Nebenzya blamed the toll on the misuse of Ukraine's air defense systems, "the use of which has led to the deaths of civilians," he said.

Nebenzya held up a QR code linking to a video he claimed showed that residential buildings were damaged by Ukrainian air defenses.

An American envoy to the Security Council said Friday's attacks underscore Putin's goal in the conflict: "He seeks to obliterate Ukraine and subjugate its people."

Ukraine's Foreign Minister Dmytro Kuleba wrote on X, formerly Twitter, that "Ukraine, along with three dozen UN Member States, requested that the Ecuadorian Presidency convene" the meeting.

Kyiv's envoy to the UN Sergiy Kyslytsya said that the overnight attack "had increased the scale of pain among the people."

He listed targets as "a maternity ward, educational facilities, a shopping mall, 45 multistory residential buildings, private houses, two churches... and a parking lot."

"Russian air terror poses a threat not only to Ukraine but to neighboring countries as well," he said referring to the claim that a missile entered Polish airspace.