War in Ukraine: Latest developments

Here are the latest developments in the war in Ukraine:

- Ukrainians 'surrounded' in Mariupol -

Ukrainian forces are "surrounded and blocked" in Mariupol as Russian forces push to take the city, Myhaylo Podolyak, an official from President Volodymyr Zelensky's office, tweets. 

The Ukrainian army insists that "the defense of Mariupol continues".

Ukrainian President Volodymyr Zelensky says he believes "tens of thousands" of people in the city have been killed.

- Chemical weapons allegations -

Britain says it is trying to verify reports that Russia has used chemical weapons in Mariupol. 

Ukrainian lawmaker Ivanna Klympush says Russia has used an "unknown substance" and that people are suffering from respiratory failure.

But an aide to the city's mayor says that a chemical attack has not been confirmed and that they are "waiting for official information from the military". 

- Russians reinforce in Donbas -

Russian forces are reinforcing around the Donbas region, notably near the town of Izyum, but have not yet launched a full offensive, Pentagon officials say.

Ukraine's defense ministry says that Russian preparations are almost over and that it believes a major assault will happen soon. 

- Austrian leader 'pessimistic' -

Austrian Chancellor Karl Nehammer says he is "rather pessimistic" about the prospects for diplomacy ending the Ukraine conflict after meeting with Russian President Vladimir Putin.

Describing Putin as having "massively entered into a logic of war", Nehammer tells reporters "peace talks are always very time-intensive while military logic says: 'Don't spend too much time and go directly into battle'".

- Violence against women -At a United Nations Security Council meeting, officials call for an investigation into violence against women during the conflict.

"We are increasingly hearing of rape and sexual violence. These allegations must be independently investigated to ensure justice and accountability," Sima Bahous, director of the UN women's agency, says.  

- French police arrive in Ukraine -

French police officers and forensic doctors arrive in Ukraine to help investigate the discovery of scores of bodies in civilian clothing scattered in Bucha and other towns around Kyiv after Russia's withdrawal from the region.

Ukraine says it has discovered 1,222 bodies in Bucha and other towns. 

- No EU consensus on sanctions -

EU foreign ministers launch discussions on a sixth round of sanctions, but fail to find a consensus, including on sanctions on oil and gas, Josep Borrell, the bloc's top diplomat, says.

- Biden, Modi discuss Ukraine -

U.S. President Joe Biden and Indian Prime Minister Narendra Modi have a "candid exchange of views" on the Ukraine crisis at a virtual summit, a senior administration official says, but there is no indication of significant progress toward a unified stance.

- Trade growth takes hit -

The war could almost halve world trade growth this year and drag down global GDP growth, according to the World Trade Organization.

- Ukraine still open to talks -

Ukraine's Foreign Minister Dmytro Kuleba says he is still open to negotiating with Moscow.

"If sitting down with the Russians will help me to prevent at least one massacre like in Bucha, or at least another attack like in Kramatorsk, I have to take that opportunity," he tells U.S. broadcaster NBC.

- France expels six Russian diplomats -

France is expelling six Russians suspected of working as spies under diplomatic cover in Paris, after the French intelligence services uncovered a clandestine operation, the foreign ministry says.

- More than 4.5 million flee -

More than 4.5 million Ukrainian refugees have now fled their country, the United Nations refugee agency says.

Ninety percent of those who have left are women and children.