Russia says it will halt hostilities to allow civilians to leave steel works in Mariupol; US promises $322m in military financing
US Secretary of State Antony Blinken
US President Joe Biden has held talks with Ukraine's defence and foreign ministers in Poland.
Some say the fact the ministers left Ukraine for the talks is a sign of growing confidence in how the war with Russia is going.
"This is a critical moment," Mr Blinken said in his opening remarks.