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

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

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 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

President Joe Biden made some of his most clear and striking assessments on Russian President Vladimir Putin’s threats of using a nuclear weapon.

For the "first time since the Cuban missile crisis, we have the direct threat of the use of a nuclear weapon if in fact things continue down the path that they are going. That’s a different deal," he said at a fundraiser in New York City on Thursday.

"We have not faced the prospect of Armageddon since Kennedy and the Cuban missile crisis," he said. "I don't think there's any such thing as the ability to easily [use] a tactical nuclear weapon and not end up with Armageddon."

Biden said Putin's military is "underperforming" in Ukraine and he may feel threatened.

Biden said he knows Putin "fairly well" and has spent "a fair amount of time with him" and warned that Putin is serious.

"He is not joking when he talks about potential use of tactical nuclear weapons, or biological, or chemical weapons because his military is, you might say, significantly underperforming," Biden said.

"There’s a lot at stake," Biden said. "We are trying to figure out what is Putin’s off ramp? Where does he get off? Where does he find a way out? Where does he find himself in a position that he does not - not only lose face but lose significant power within Russia?"

-ABC News' Justin Gomez