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

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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China pushes back against US claims it may supply weapons to Russia

The United States' claims that they have intelligence showing China plans to provide weapons to Russia to assist in the ongoing war in Ukraine will impede the "political settlement of the Ukrainian crisis" and "will also further damage" China-US relations, Chinese Foreign Ministry spokesperson Wang Wenbin said during a press conference Thursday.

Wenbin called US claims of intelligence "nothing more than catching up on the wind, slandering and discrediting China."

"Since the outbreak of the crisis in Ukraine, China has been steadfast in dialogue. While standing on peace, it has persuaded and introduced peace in its own way and played a constructive role in resolving the crisis in line with the situation," Wenbin said.

-ABC News' Ellie Kaufman and Karson Yiu

Eiffel Tower lit up in blue and yellow

The Eiffel Tower in Paris has been lit up in blue and yellow in honor of the one-year anniversary of the war in Ukraine.

-ABC News' Alexandra Faul

13 million people have been displaced due to the war in Ukraine

A year into the war in Ukraine, 13 million people have been displaced, including nearly 8 million refugees across Europe and more than 5 million internally displaced in Ukraine, the U.N. High Commissioner for Refugees said in a statement Thursday.

"The vast majority of refugees and internally displaced Ukrainians – some 77% and 79%, respectively – want to return home one day, however, only 12% of both refugees and [internally displaced people] plan to do so in the next three months," the UNHCR said in a press release.

-ABC News' Zoe Magee

Air raid sirens go off across Ukraine; 4 airstrikes in Kharkiv injure 2

Air raid sirens went off across Ukraine on Wednesday due to jets taking off in Belarus.

There were four strikes from Russian S-300 missiles on industrial infrastructure facilities in central Kharkiv, the head of Kharkiv's Regional Military Administration Oleh Synegubov said.

Two men, ages 46 and 57, were injured from the attacks. They have both been hospitalized.

In Izyum, a city in the Kharkiv region of Ukraine, a 55-year-old civilian stepped on a "petal" mine. He was hospitalized with an explosive wound, Synehubov said.

One person was killed and another person was injured from fighting in the Donetsk region of Ukraine on Tuesday, the head of the Donetsk Regional Military Administration Pavlo Kyrylenko said.

-ABC News' Natalia Kushnir

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.

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.