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

Russian President Vladimir Putin has ordered a partial mobilization of reservists in Russia, in an apparent admission that his war in neighboring Ukraine isn't going according to plan.

In a seven-minute televised address to the nation that aired on Wednesday morning, Putin announced the start of the mobilization -- the first in Russia since World War II. The measure is expected to draft more than 300,000 Russian citizens with military experience, according to Russian Defense Minister Sergei Shoigu.

The move comes as Moscow is poised to annex all the regions it occupies in Ukraine in the coming weeks, with plans to hold sham referendums this weekend in an effort to politically legitimize its actions. By declaring those areas officially Russian territory, Putin is also threatening that any continued efforts by Ukraine to retake them will be seen as a direct attack on Russia. In his speech Wednesday, the Russian leader raised the specter of using nuclear weapons if Ukraine continues to try to liberate the occupied regions.

"In the event of a threat to the territorial integrity to our country, for the protection of Russia and our people, we of course will use all means in our possession," Putin said. "This is not a bluff."

"Those who are trying to blackmail us with nuclear weapons should know that the wind can turn in their direction," he added.

It's an attempt to regain the initiative after disastrous setbacks in Russia's war against Ukraine.

Russia has been suffering severe manpower shortages in Ukraine after months of heavy losses, mainly because the Kremlin has pretended it is fighting not a war but a "special military operation." That, in part, allowed Ukraine's spectacular counteroffensive in the country's northeast two weeks ago, which led to the collapse of Russia's frontline there.

Military experts and Russian commentators themselves had acknowledged that without a mobilization, Moscow is not capable of anymore offensive operations in Ukraine and in the longterm might well be unable to even hold the territory it has already taken.

Putin has balked at ordering a mobilization, until now, because of the huge political risks it carries for him at home. Russians have proved relatively supportive of the war while they have not been ordered to fight it, but this carries much bigger risks now of domestic unrest. It will bring up dangerous memories of the Soviet disaster in Afghanistan and Chechnya.

Yet Putin has clearly decided he must take the risk, with losing the war in Ukraine seen as an existential danger to his regime.

The mobilization order has profound implications for not just Russia and Ukraine, but also for Europe and the United States. It means Putin is expanding the war in Ukraine even further, ready to throw hundreds of thousands more people into it -- making the fight harder again for Ukraine, while also raising the threat of nuclear strikes on it. And at home, Putin is going to enter uncharted waters.

-ABC News' Patrick Reevell and Tom Soufi Burridge