Russia-Ukraine updates: Putin suspends key US-Russia nuclear treaty in speech denouncing West

There have been a series of Russian missile strikes on Kyiv, with the city's mayor, Vitaliy Klitchko, saying two residential buildings have been hit and several missiles were shot down by air defense.

Unverified videos circulating show an apartment block engulfed in flames.

Klitchko said at least one person was killed during the afternoon strikes on the city's center. A body has been recovered from one of the residential buildings that was hit.

Russia launched 100 missiles on Ukraine Tuesday, the highest number of missiles launched in a single day since the beginning of the war, according to Yuri Ignat, Ukraine's Air Force spokesman.

Previously, the highest number of missiles was 84 missiles launched on Oct. 10.

Nearly 50% of Kyiv remains without power tonight, according to Vitaliy Klychko, the city's mayor.

-ABC News' Tom Soufi Burridge and Will Gretsky

The International Atomic Energy Agency will send security missions to three nuclear plants in Ukraine, the agency announced Monday.

Safety and security experts will be dispatched to the South Ukraine, Khmelnytskyi and Rivne Nuclear power plants following a request from Ukraine, the IAEA said in a statement. A security mission will also be conducted at the Chernobyl site, said IAEA Director General Rafael Mariano Grossi.

The IAEA already has a team of experts continuously present at the country’s largest such facility, the Zaporizhzhya plant, and has been carrying out safety measures and checks at three other locations in Ukraine at the request of the Ukrainian government following allegations by the Russian Federation about activities there, according to the agency.

"From the beginning of the war in Ukraine, the IAEA has been doing everything it can to prevent a nuclear accident with potentially serious consequences for public health and the environment," Grossi said. "We have delivered nuclear safety and security equipment, produced impartial assessments of the situation, and provided technical expertise and advice."

-ABC News' Will Gretzky

The United Nations General Assembly has approved its fifth resolution this year that supports Ukraine and rebukes Russia, declaring that Moscow should pay for damages caused by its invasion.

The resolution, which 94 countries voted in favor of, calls for the creation of “an international mechanism for reparation for damage, loss or injury” resulting from the war.

The resolution was co-sponsored by Canada, Guatemala, Netherlands and Ukraine. China was among the 14 countries that voted against it. There were 73 absentations.

While not legally binding, General Assembly resolutions have been viewed by Western powers as a powerful messaging tool through the conflict, communicating worldwide opposition to Russia’s invasion.

-ABC News' Shannon Crawford

A U.S. citizen has been freed from prison in Kherson, the southern city that Russia had occupied for about eight months, according to a member of Ukraine's parliament.

Swede Merekezi was arrested in Kherson in July and had not been in contact with officials for "a long time," Ukraine parliament member Alexandr Kovaliov said in a statement posted to Facebook on Monday.

Merekezi was in Ukraine to defend "our country’s independence" and will be heading home on Monday, Kovaliov said.

A spokesperson for the U.S. Department of State said they are aware of unconfirmed reports but declined to comment further due to privacy concerns.
"This once again proves the cohesion and hard work of our team," Kovaliov said.

-ABC News' Shannon Crawford and Will Gretsky