Here are some of the latest comments:

U.S. PRESIDENT JOE BIDEN:

"The brave people of Ukraine fight on, unbowed in their determination to defend their freedom and future. NATO is stronger, larger, and more united than ever.

"And the unprecedented 50-nation global coalition in support of Ukraine, led by the United States, remains committed to providing critical assistance to Ukraine and holding Russia accountable for its aggression.

"The American people and people around the world understand that the stakes of this fight extend far beyond Ukraine."

MOLDOVAN PRESIDENT MAIA SANDU:

"I thank Ukrainians for their tireless fight for freedom and for protecting peace in Moldova too. In these two years, the free world has shown unprecedented solidarity, yet the war persists; our support must endure fiercely."

ITALIAN PRIME MINISTER GIORGIA MELONI:

"This place is the symbol of Moscow failure, this place is the symbol of Ukrainian pride ... This land is a piece of our home and we will do our bit to defend it." (Speaking at Hostomel airport, near Kyiv)

POLISH PRIME MINISTER DONALD TUSK:

"Two years of Ukrainian heroism. Two years of Russian barbarism. Two years of disgrace of those who remain indifferent."

EUROPEAN COMMISSION PRESIDENT URSULA VON DER LEYEN:

"More than ever, we stand firmly by Ukraine. Financially, economically, militarily, morally. Until the country is finally free."

BRITISH PRIME MINISTER RISHI SUNAK:

"We must renew our determination...on this grim anniversary. This is the moment to show that tyranny will never triumph and to say once again that we will stand with Ukraine today and tomorrow.

"We are prepared to do whatever it takes, for as long as it takes, until they prevail."

POLISH PRESIDENT ANDRZEJ DUDA:

"We have supported, support and will support Ukraine in its fight for freedom! Today, this support is still extremely necessary. Regardless of war fatigue. The free world cannot allow Putin and Russia to triumph."

ROMANIAN PRIME MINISTER MARCEL CIOLACU:

"Commemorating today 2 years of [Russia's] war of aggression against Ukraine. We stand united and in full solidarity with [Ukraine], until it achieves victory and a just peace."

GERMAN CHANCELLOR OLAF SCHOLZ:

"Ukraine is standing because Ukraine is strong and courageous, and because it has friends in Europe and all over the world. We are proud to be among her friends - today and in our common European future."

SLOVAK PRESIDENT ZUZANA CAPUTOVA:

"Ukraine is still standing, defending its people, our shared values and the rules-based order. And we are by Ukraine's side."

(Reporting by Reuters; Compiled by Mike HarrisonEditing by Alex Richardson and Tomasz Janowski)