War in Ukraine: Latest developments

Here are the latest developments in the war in Ukraine:

- New Kyiv curfew -

Kyiv mayor Vitali Klitschko announces a new weekend curfew in the Ukrainian capital.

"The military command decided to reinforce the curfew. It will start from 8:00 pm Saturday and last until 7:00 am on Monday," he says on Telegram.

- Biden to meet ministers -

Joe Biden is due to meet with Ukraine's foreign and defence ministers in Warsaw in the first face-to-face meeting between the US president and top Kyiv officials since Russia's invasion began.

Foreign Minister Dmytro Kuleba and Defence Minister Oleksii Reznikov will be making a rare trip out of Ukraine in a possible sign of growing confidence in the fightback against Russian forces.

- 'Russia fuelling arms race' -

Russia's "bragging" about its nuclear weapons is fuelling a dangerous arms race, Ukrainian President Volodymyr 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.

- Russian minister resurfaces -

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

The defence ministry published a video showing Shoigu chairing a meeting on Russia's weapons budget.

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

- Zelensky seeks Qatar's help -

Ukraine's leader calls 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 says.