War in Ukraine: Latest developments

Here are the latest developments in the war in Ukraine:

- Ukraine rejects Russian ultimatum -

Russia gives the besieged city of Mariupol until 5:00 am on March 21 to surrender, warning that Ukrainian soldiers and volunteer fighters who refuse face being court martialled or worse for their "horrible crimes".

Ukraine's Deputy Prime Minister Iryna Vereshchuk rejects the ultimatum, telling local media "there can be no talk of surrendering weapons".

- Eight killed in Kyiv mall bombing -

At least eight people are killed in the bombing of a shopping centre in northwest Kyiv. The 10-storey building is completely destroyed in the blast.

Kyiv mayor Vitali Klitschko announces a new curfew for the capital from 8:00 pm (1800 GMT)  until Wednesday morning. 

- Ammonia leak -

In the north, Ukrainians within a 2.5 kilometres (1.5 miles) radius are told to temporarily take shelter after alleged Russian artillery shelling hits the Sumykhimprom fertiliser plant causing an ammonia leak.

An all-clear is sounded mid-morning.

- Russia committing 'war crime' in Mariupol: EU -

The EU's foreign policy chief Josep Borrell calls Russia's attack on the port city of Mariupol "a massive war crime" as EU foreign ministers meet to discuss imposing more sanctions on Moscow.

- Zelensky urges EU to stop trade with Russia -

Ukrainian President Volodymyr Zelensky calls on European leaders to cease all trade with Russia.

"No euros for the occupiers. Close all of your ports to them. Don't export them your goods. Deny energy resources. Push for Russia to leave Ukraine," he says in a video address.

- Kremlin warns on oil ban -

The Kremlin warns the EU against an embargo on Russian oil and gas, saying it would have a direct impact on everyone. 

"Such an embargo will have a very serious impact on the world energy market, it will have a very serious negative impact on Europe's energy balance," says Kremlin spokesman Dmitry Peskov.

- Biden to Europe -

US President Joe Biden will travel to Poland on Friday to meet President Andrzej Duda, the White House says.

- School attacked -

Ukrainian authorities accuse Russia of bombing a Mariupol art school where some 400 people, including women and children, had been sheltering.

- Forcible transfer -

Mariupol officials claim Russian forces have forcibly transported around a thousand residents to Russia and stripped them of their Ukrainian passports -- a potential war crime.

- Turkey says Russia, Ukraine 'close to agreement' -

Turkish Foreign Minister Mevlut Cavusoglu says Russia and Ukraine have made progress in negotiations and are "close to an agreement".

Turkey says it is also ready to host a meeting between Zelensky and Russian President Vladimir Putin.

- Diplomats to return -

Slovenian Prime Minister Janez Jansa announces the country's diplomats will return to Kyiv "soon" and calls on other EU members to do the same. Ukraine "needs direct diplomatic support", he says.

- China says not arming Russia -

China's ambassador to the US says his country is not sending weapons to Russia for use in Ukraine, but he does not definitively rule out the possibility Beijing might do so in the future.

- Nearly 3.5 million flee country -

Nearly 3.5 million Ukrainians have now fled the country following Russia's invasion, the United Nations says, of 10 million who have been displaced from their homes.