Ukraine war live updates: Biden calls Putin a 'crazy SOB'; Russia signals it could try to capture Kyiv again

This is CNBC's live blog tracking developments on the war in Ukraine. See below for the latest updates. 

U.S. President Joe Biden called Russian President Vladimir Putin a "crazy SOB" during a fundraiser in San Francisco on Wednesday. Speaking to a small group of donors, Biden said the climate crisis was an existential threat but that geopolitical risks could not be discounted.

"This is the last existential threat. It is climate. We have a crazy SOB like that guy Putin and others and we always have to worry about nuclear conflict, but the existential threat to humanity is climate," Biden said.

Biden has previously cursed "son of a b----" at others. In January 2022, he was caught on the hot mic using the same term against a Fox News White House reporter.

In other news, a senior Russian official has signaled that Moscow will not be satisfied with occupying four Ukrainian regions and could again try to capture the capital Kyiv.

Deputy chairman of the Russian Security Council, Dmitry Medvedev, told Russian media agencies that Russia could "reach Kiev" (Russia uses Soviet-era spellings when referring to Ukrainian place names) and that it was a matter of time.

President Joe Biden called Russian President Vladimir Putin a "crazy SOB" during a fundraiser in San Francisco on Wednesday, warning there is always the threat of nuclear conflict but that the existential threat to humanity remains climate.

"This is the last existential threat. It is climate. We have a crazy SOB like that guy Putin and others and we always have to worry about nuclear conflict, but the existential threat to humanity is climate," Biden told a small group of donors.

Biden has previously cursed "son of a bitch" at others. In January 2022, he was caught on