US President Joe Biden Pays Surprise Visit To Kyiv Ahead Of Russia-Ukraine War Anniversary. SEE PICS

Biden's visit coincided with the one-year anniversary of Russia's invasion of Ukraine; on February 24, last year, Vladmir Putin initiated "special military operations" in the country.

US President Joe Biden And Ukrainian President Volodymyr Zelenskyy 

US President Joe Biden paid an unexpected visit to Ukraine's capital, Kyiv, on Monday. His visit coincided with the one-year anniversary of the Russian invasion - Vladimir Putin initiated "special military operations" in Ukraine on February 24 last year. (Image Source: AFP)

In a statement, Biden said he is in Kyiv to visit his Ukrainian counterpart Volodymyr Zelensky and reiterate his "unwavering commitment to Ukraine's democracy, sovereignty, and territorial integrity". (Image Source: AFP)

Over a year after Russia invaded, Zelensky lauded Biden's unannounced visit as a critical show of support. "Joseph Biden, welcome to Kyiv! Your visit is an extremely important sign of support for all Ukrainians," Zelensky was quoted by AFP. (Image Source: AFP)

"As we approach the anniversary of Russia's horrific invasion of Ukraine, I'm in Kyiv today to meet with President Zelenskyy and reaffirm our unwavering commitment to Ukraine's democracy, sovereignty, and territorial integrity," Biden stated in a series of tweets. (Image Source: AFP)

He also took advantage of the chance to attack Putin. "When Putin launched his invasion nearly one year ago, he thought Ukraine was weak and the West was divided. He thought he could outlast us. But he was dead wrong." (Image Source: AFP)

Over the past year, the United States has assembled a coalition of nations from the Atlantic to the Pacific to provide unparalleled military, economic, and humanitarian support to Ukraine - and that support will endure." (Image Source: AFP)

Lesia Vasylenko, a Ukrainian MP, welcomed Biden in a tweet: "Yes, confirmed @POTUSin #Kyiv. Welcome Mr President! Looking forward to the announcements following the air raid sirens experience (sic)." (Image Source: AFP)