War in Ukraine: Latest Developments

Here are the latest developments in the war in Ukraine:

- Biden meets Ukraine ministers -

President Joe Biden calls his Russian counterpart Vladimir Putin a "butcher" who "cannot remain in power" after meeting top Ukrainian ministers for the first time since Russia's invasion of Ukraine.

Within minutes of his comments in Warsaw, a White House official plays down the remarks, saying Biden "was not discussing Putin's power in Russia, or regime change".

Biden compares Ukraine's resistance against Russia to the anti-Soviet "battle for freedom", but warns that the world must prepare for a "long fight ahead."

- Over 3.7 million refugees -

More than 3.7 million people have fled Ukraine since Russia's invasion a month ago, the U.N. says.

The U.N.'s refugee agency, UNHCR, says 3,772,599 Ukrainians have fled the country -- an increase of 46,793 from the previous day's figure.

Around 90 percent of them are women and children. The U.N. estimates that another 6.5 million people are displaced in Ukraine.

- Ukraine president calls for weapons -

In his latest video address, President Volodymyr Zelensky reiterates a call for planes while urging allies to supply Ukraine with more weapons.

"We need more ammunition. We need it to protect not only Ukraine but other Eastern European countries that Russia threatened to invade," he says.

"What is NATO is doing? Is it being run by Russia? What are they waiting for? It's been 31 days. We are only asking for one percent of what NATO has, nothing more."

- UK says sanctions could be eased with peace -

British Foreign Secretary Liz Truss says UK sanctions against Russia could be lifted if Moscow commits to a full ceasefire and withdraws its troops.

Truss says the Kremlin must also agree to "no further aggression" towards Ukraine for the British sanctions imposed on hundreds of people and entities to remain eased.

"Sanctions should only come off with a full ceasefire and withdrawal, but also commitments that there will be no further aggression," Truss tells the Sunday Telegraph. 

- UK criticized over refugee policy -

Thousands of people rally in London in solidarity with Ukraine, as the capital's mayor steps up criticism of the government's response to the refugee crisis.

"We want the people of Ukraine to know that in their darkest hour, they are not alone," Sadiq Khan tells Sky News as the demonstrators gather.

The Labor mayor says he is "embarrassed" by the Conservative government's refugee policies. Red tape is hampering the generous response of the British people, he says.

- Missiles strikes on Lviv -

At least five people are wounded in two barrages of strikes that damage infrastructure including a fuel storage facility in a rare attack on the western Ukrainian city of Lviv.

Mayor Andriy Sadovy says the fuel storage facility caught fire after the first strikes, while the second round inflicted "considerable damage" to a defense facility in a residential area.

- Russia takes Chernobyl town -

Russian forces take control of a town where staff working at the Chernobyl nuclear site live and briefly detain the mayor, sparking protests, Ukrainian officials say.

"I have been released. Everything is fine, as far as it is possible under occupation," Yuri Fomichev, mayor of Slavutych, tells AFP by phone, but later reports the death of three civilians. 

- Ukraine forces recapture town -

Ukraine says its forces have recaptured the northeast town of Trostianets, near the Russian border, one of the first towns taken in the Russian invasion.

Its defense ministry publishes images showing Ukrainian soldiers and civilians among heavily damaged buildings, and what appeared to be abandoned Russian military equipment along with a signpost to the town.

- Kyiv curfew cancelled -

The mayor of Ukraine's capital Kyiv cancels a curfew announced just hours earlier for the next day.

"New information from the military command: the Kyiv curfew will not enter into force tomorrow," mayor Vitali Klitschko announces on Telegram.

- Russian minister resurfaces -

Russia's defense minister Sergei Shoigu reappears on television after a two-week absence from view prompted questions from journalists.

No dates accompany the images on state television, but Shoigu refers to a finance ministry meeting that took place on Friday.

- Russia fueling nuclear arms race: Zelensky -

Russia's "bragging" about its nuclear weapons is fueling a dangerous arms race, Zelensky tells the Doha Forum.

"They are bragging that they can destroy with nuclear weapons not only a certain country but the entire planet," Zelensky says in a live video message to the forum.

Ukraine's leader calls on Qatar to increase production of natural gas to counter Russian threats to use energy as a weapon.

- Russia denies calling up reservists -

Russia denies it is planning to call up reservists, denouncing what it claims are "false" summons to Russian men by Kyiv's security services.

"The Russian defense ministry is not summoning and does not plan to summon any reservists to the military commissariats," spokesman Igor Konashenkov says in a statement.

- Turkey open to Russian oligarchs -

Russia's oligarchs can continue to do business in Turkey so long as they respect national and international law, Foreign Minister Mevlut Cavusoglu says.

Turkey has described Russia's invasion of Ukraine as "unacceptable" and has offered its services as a mediator to help end the war, but has not joined the sanctions imposed by the United States and EU member states.