The United States announced Friday a series of fresh sanctions against those who are supporting Russia's war in Ukraine.

The White House said the new sanctions target more than 200 people and companies in Russia and other countries around the world. The Biden administration will also target a dozen Russian financial institutions as well as Russian officials and will restrict U.S. companies from exporting products to around 90 companies in Russia and other countries, including China, according to the White House.

The products that will be limited, such as semiconductor chips, are being used for "sanction evasion and backfill activities in support of Russia's defense sector," the White House said.

The U.S. will also increase tariffs on Russian metals, minerals and chemicals, which will eventually cost Moscow some $2.8 billion, according to the White House.

"These sanctions, export controls, and tariffs are part of our ongoing efforts to impose strong additional economic costs on Russia," the White House said. "We will continue to work with our allies and partners to use all economic tools available to us to disrupt Russia’s ability to wage its war and degrade its economy over time."

The announcement came on the one-year anniversary of Russia's full-scale invasion of neighboring Ukraine.

-ABC News' Cheyenne Haslett

As tens of thousands of Russian troops lined up along Ukraine’s eastern and northern borders for "military exercises" last February, some international observers warned that Russia was about to do the unthinkable.

U.S. President Joe Biden had declassified intelligence in the weeks prior that showed an attack on Ukraine's sovereignty was imminent. That intel was shared with allies, in an attempt to rally support and to stop the war, but the effort proved unsuccessful. The invasion began on Feb. 24, 2022.

The following four seasons have seen some of the bloodiest fighting on European soil in generations. Tens of thousands of Russian and Ukrainian troops have been killed. And Ukrainian civilians have been terrorized by missiles aimed at energy infrastructure, city centers and apartment buildings.

This month marks both the 9-year anniversary of Russian President Vladimir Putin's invasion of Ukraine's Crimean Peninsula, which he illegally annexed in 2014, and the first anniversary of his full-scale invasion of Ukraine.

The ends to which he'd go in his mission to capture Ukraine have become clear in the last year.

-ABC News' Kevin Shalvey

There was a somber mood over Kyiv on Friday morning as the country marks the one-year anniversary of Russia's full-scale invasion while bracing for a potential barrage of missile strikes.

Ukrainian President Volodymyr Zelenskyy, along with the country's top general and the defense minister, took part in a military ceremony in Sofia Square in the historical center of the capital city. Zelenskyy and Poland's president also visited a memorial wall for fallen Ukrainian soldiers.

Ukrainians are anticipating Russian missile strikes to mark the anniversary, amid warnings from the Ukrainian Air Force that there is a high risk of them. But so far it has been quiet, with no major strikes beyond routine shelling in northern and eastern Ukraine.

-ABC News' Patrick Reevell

Russian President Vladimir Putin announced on Feb. 21, 2022, that he had recognized two Russian-backed separatist areas in eastern Ukraine, Donetsk and Luhansk, as independent states.

Ukrainian President Volodymyr Zelenskyy followed the announcement by saying that Ukraine had cut diplomatic ties with Russia. Putin then gave a speech on Feb. 24, 2022, announcing he would launch a "special military operation" in Ukraine.

Minutes after the announcement, explosions could be heard in Kyiv. What followed was a full-scale invasion of Ukraine, with thousands of troops crossing the country's borders. Here are the key events that occurred in the year since then.

-ABC News' Nadine El-Bawab

Russia's security services have arrested an anti-Kremlin political commentator who the jailed Wall Street Journal reporter Evan Gershkovich met with shortly before his own arrest.

Yaroslav Shirshikov has said he spent two days showing Gershkovich around the city of Yekaterinburg during a reporting trip there a couple of weeks before Russia seized Gershovich.

Shirshikov said he had been due to meet with Gershkovich again the week the reporter was arrested in the city.

This morning, local media published video showing masked security officers detaining Shirshikov in his apartment and searching it.

A local news outlet cited a security services representative saying Shirshikov may have been arrested for posting comments cheering the assassinations of two ultra-nationalist pro-war figures, Daria Dugina and the blogger Vladen Tatarsky.

The site UralLive quoted a law enforcement source that Shirshikov was detained on a charge of “justifying terrorism”, which carries a maximum sentence of 7 years prison. It linked the charge to a social media post in which Shirshikov wrote he wasn’t sad over the death of Tatarsky, who was killed in a bomb attack in St. Petersburg this month.

Shirshikov spoke to several international media outlets including ABC following Gershkovich's arrest. He said that Gershkovich had acted entirely as a professional journalist in Yekaterinburg, conducting interviews openly and doing usual reporting.

Shirshikov is a critic of the Russian government and has spoken publicly about his opposition to the war in Ukraine.

-ABC News' Patrick Reevell