Here are the latest developments in Ukraine.
The war in Ukraine entered its fourth week on Thursday with no clear signs of a peaceful resolution, hours after President Volodymyr Zelensky made a desperate appeal to the United States and Europe for more aid to help his military fend off invading Russian forces.
The United States announced another $800 million in aid, in addition to the $13.6 billion that had already been approved, after Mr. Zelensky spoke to Congress on Wednesday as part of his virtual tour to seek moral and financial support from allies. But President Biden stopped short of agreeing to provide what Mr. Zelensky says would be the most valuable tools for repel Russian forces: fighter planes and a no-fly zone over his country.
Peace talks between Russia and Ukraine will enter a fourth day on Thursday. But President Vladimir V. Putin of Russia has sent conflicting signals about his willingness to negotiate — offering optimism for the talks even as Russian forces increasingly target civilians.
On Thursday morning in Mariupol, a port city that has been under siege for weeks, the fate of hundreds of people inside a shelter was unclear after reports that Russia had bombed it throughout the night.
The humanitarian toll in Ukraine grows precipitously each day. More than two million people have already left the country as refugees and another two million are displaced inside it.
All the while, the United States and its allies are pushing Russia further into isolation, imposing sanctions that have pounded its financial system and choked off the flow of foreign currency, stoking fears of a sovereign debt default.
Here’s the latest on the war:
More than 7,000 Russian soldiers have died since the start of the war, possibly crimping morale, according to American intelligence. That is greater than the number of American troops killed over 20 years in Iraq and Afghanistan.
Mr. Zelensky, in his nightly speech, asked world leaders to impose more sanctions on Russian leaders, to help put pressure on the government to end the war.
Mr. Biden called Mr. Putin a "war criminal," escalating the clash of words between the two leaders. A top Russian official said the comment was "unacceptable and unforgivable."