Live: Zelensky urges Qatar to boost gas production to counter Russia

9:51 am: Ukraine says more than 130 children have been killed since Russia's invasion began

The war in Ukraine has killed 136 children in the 31 days since the start of the Russian invasion, Ukraine's office of the prosecutor general said on Saturday in a message on the Telegram app.

Of the total, 64 children have been killed in the Kyiv region, the office said. A further 50 children have died in the Donetsk region, it said.

Additionally, 199 children have been wounded, the office said.

9:30 am: Zelensky calls on Qatar, other energy-producing countries to boost natural gas output

Ukraine's President Volodymyr Zelensky on Saturday called on Qatar to increase production of natural gas to counter Russian threats to use energy as a weapon.

"I ask you to increase the output of energy to ensure that everyone in Russia understands that no one can use energy as a weapon to blackmail the world," Zelensky said in a video message to the Doha Forum meeting in Qatar's capital.

Zelensky said countries such as Qatar could make a contribution to the stabilisation of Europe.

8:51 am: Russian forces say they are focusing on Luhansk and Donetsk

Russian forces say they are aiming to take control of the entire Luhansk and Donetsk administrative regions in Ukraine's Donbas. FRANCE 24's Gulliver Cragg reports from Kyiv.

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8:15 am: Ukraine's army reports clashes with Russian forces in Donbas

Ukraine’s army said Saturday it had clashed with Russian forces around the cities of Donetsk and Luhansk in Ukraine’s eastern Donbas region.

In a dawn report, the army’s general staff said it had “inflicted significant losses”, claiming to have shot down three planes, destroyed eight tanks and killed dozens of soldiers.

8:04 am: Biden to meet with Poland's Duda, deliver speech on Ukraine war 

US President Joe Biden will argue in a speech in Poland on Saturday that the "free world" opposes Russia's invasion of Ukraine and that there is unity among major economies on the need to stop Russian President Vladimir Putin, the White House said.

After three days of emergency meetings with allies of the G7, European Council and NATO, and a visit with US troops in Poland, Biden will meet with Polish President Andrzej Duda.

In what US officials were billing as a major address, Biden "will deliver remarks on the united efforts of the free world to support the people of Ukraine, hold Russia accountable for its brutal war, and defend a future that is rooted in democratic principles," the White House said in a statement.

(FRANCE 24 with AFP, AP and REUTERS)