Russia-Ukraine updates: Putin suspends key US-Russia nuclear treaty

President Vladimir Putin said he'd sought an "open dialogue" with the West.

Almost a year after Russian President Vladimir Putin launched a full-scale invasion of neighboring Ukraine, the two countries are engaged in a struggle for control of areas throughout the east and south.

Putin's forces pulled out of key positions in November, retreating from Kherson as Ukrainian troops led a counteroffensive targeting the southern port city. Russian drones have continued bombarding civilian targets throughout Ukraine, knocking out critical power infrastructure as winter sets in.

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Latest headlines:

Here's how the news is developing. All times Eastern.
Feb 20, 2023, 12:01 PM EST

US announces new $460 million worth of weapons for Ukraine

The Pentagon announced a new presidential drawdown of security aid for Ukraine valued at up to $460 million on Monday.

This package will include four Bradley Infantry Fire Support Team vehicles, HIMARS ammunition, artillery and mortar rounds, air surveillance radars and more.

President Joe Biden hinted at the new supplies in a press conference from Kyiv on Monday, also saying he would be announcing new sanctions "against elites and companies that are trying to evade sanctions and backfill Russia's war machine" later this week.

-ABC News' Matt Seyler

Feb 20, 2023, 5:39 AM EST

Biden in Kyiv says Putin was 'dead wrong'

U.S. President Joe Biden said Monday that Russian President Vladimir Putin was "dead wrong" when he started the war in Ukraine on Feb. 24, 2022.

"When Putin launched his invasion nearly one year ago, he thought Ukraine was weak and the West was divided," Biden said in a statement. "He thought he could outlast us. But he was dead wrong."

The White House released the statement from Biden as he made an unannounced visit to the war-torn country, arriving in Kyiv on Monday morning.

"As the world prepares to mark the one-year anniversary of Russia's brutal invasion of Ukraine, I am in Kyiv today to meet with President Zelenskyy and reaffirm our unwavering and unflagging commitment to Ukraine’s democracy, sovereignty, and territorial integrity," Biden said.

President Joe Biden, center, poses with Ukrainian President Volodymyr Zelenskyy, right, and Olena Zelenska, left, spouse of President Zelenskyy, at Mariinsky Palace during an unannounced visit in Kyiv, Ukraine, Monday, Feb. 20, 2023.
Evan Vucci/AP

"Today, in Kyiv, I am meeting with President Zelenskyy and his team for an extended discussion on our support for Ukraine. I will announce another delivery of critical equipment, including artillery ammunition, anti-armor systems, and air surveillance radars to help protect the Ukrainian people from aerial bombardments," he continued. "And I will share that later this week, we will announce additional sanctions against elites and companies that are trying to evade or backfill Russia's war machine. Over the last year, the United States has built a coalition of nations from the Atlantic to the Pacific to help defend Ukraine with unprecedented military, economic, and humanitarian support -- and that support will endure."

Biden added: "I also look forward to traveling on to Poland to meet President Duda and the leaders of our Eastern Flank Allies, as well as deliver remarks on how the United States will continue to rally the world to support the people of Ukraine and the core values of human rights and dignity in the UN Charter that unite us worldwide."

Feb 20, 2023, 5:21 AM EST

Biden makes surprise visit to Ukraine

U.S. President Joe Biden made an unannounced visit to war-torn Ukraine on Monday, arriving in Kyiv as Washington signals its ongoing support ahead of the one-year anniversary of Russia's invasion.

Biden's visit came ahead of a planned meeting with NATO allies in Poland. He is expected to give a speech at the Royal Castle Arcades in Warsaw on Tuesday evening to offer an appraisal of international support during the first year of the war and to address "how we will continue to stand with the people of Ukraine for as long as it takes," White House spokesperson Karine Jean-Pierre said in a statement earlier this month.

President Joe Biden is greeted by Ukrainian President Volodymyr Zelenskyy during a visit in Kyiv on Feb. 20, 2023.
Dimitar Dilkoff/AFP via Getty Images

Biden also plans to meet in Poland with leaders of the Bucharest Nine, a group of eastern NATO allies formed in 2015 in response to Russia's annexation of Ukraine's Crimean Peninsula.

Ukrainian President Volodymyr Zelenskyy made a dramatic visit to the United States in December, his first known international trip since the Russian invasion began in February 2022. Zelenskyy met with Biden at the White House in Washington, D.C., before addressing members of U.S. Congress on Capitol Hill.

Feb 19, 2023, 1:03 PM EST

Russia planning nuclear exercises to disrupt Biden's Europe visit, Ukrainian military says

Ukraine's military intelligence agency has accused Russia of planning to stage "large-scale nuclear exercises" to coincide with President Joe Biden's visit to Europe next week.

The GUR said Russia is preparing for test launches of nuclear capable missiles from land and sea, the agency said in a statement Sunday on its official Telegram channel.

President Joe Biden smiles before speaking, May 3, 2022, in Troy, Ala.
Evan Vucci/AP, FILE

The GUR said a nuclear armed submarine has been placed on the "highest level" of combat readiness and that strategic bombers have been moved to a base in Tambov, Russia.

The agency claimed the exercises are intended disrupt President Joe Biden's European trip.

"Such actions of the military and political leadership of the Russian Federation, in particular, are an attempt to hinder Joe Biden's visit to Europe, which is scheduled for February 20-22, through direct nuclear blackmail and to weaken international support for Ukraine," the GUR statement said.

- ABC News' Patrick Reevell

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