A White House official declined to lay out the specifics of any potential U.S. response, but said that Biden was "detailed" and "direct" with the Chinese leader.
Supplies are running low at Lviv's regional cancer hospital in Ukraine. The patient load has doubled and supplies in Kyiv are inaccessible. But hospital staff choose the duty of care over safety.
"This is a terrible price of war that Ukraine is paying today," Lviv Mayor Andriy Sadovyi said as his city paid tribute to the youngest victims of violence.
The western Ukrainian city of Lviv has been a bastion of relative normalcy since the Russian invasion began last month. Friday's strike, just over 4 miles from the city center, rattled residents.
It's been three weeks since Russia invaded Ukraine, and while many thought that it would be over quickly, Ukraine is continuing to fend Russia off. Now, some analysts think Ukraine could win the war.
The Russian president's references to "cleansing" of "scum and traitors" evoked terrifying memories of the mass arrests of the Stalin era, when repression was justified for "cleansing" Soviet society.
The World Health Organization has verified 43 attacks on health care in the three weeks since Russia invaded Ukraine, and says hundreds of facilities remain at risk.
The House of Representatives overwhelmingly passed a bill suspending normal trade relations with the countries, another move to squeeze them economically in retaliation for the invasion of Ukraine.
The lead singer in Ukraine's biggest rock band is one of Ukrainian celebrities who are using their fame and connections to speed relief supplies to those who need them most.
The package by the White House includes missiles to take out tanks and bring down Russian aircraft — as well as drones that the U.S. hasn't provided previously.
Checkpoints have sprung up across Ukraine since Russia's invasion. Men at a checkpoint near Lviv have Molotov cocktails ready. Even hundreds of miles from the battles, the war hangs over everything.