Vice President Kamala Harris has scheduled a trip to Warsaw, Poland, and Bucharest, Romania, next week, according to her office.

Harris will meet with leaders of both countries from March 9 to March 11, deputy press secretary Sabrina Singh said in a statement.

"They will discuss our continuing support for the people of Ukraine through security, economic, and humanitarian assistance and our determination to impose severe economic consequences on Russia and those complicit in Russia’s invasion," she said.

"The vice president’s meetings will also focus on how the United States can further support Ukraine’s neighbors as they welcome and care for refugees fleeing violence," Singh added.

-ABC News' Ben Gittleson

The White House on Friday did not rule out banning Russian oil imports to the U.S., saying it was "looking at ways to reduce the import of Russian oil," but showed continued reluctance in light of the impact it would have on energy prices.

“We are considering a range of options, but what's really essential is that we maintain a steady supply of global energy,” Cecilia Rouse, the chair of the White House's Council of Economic Advisers, said at the White House press briefing.

Adding, “Energy is a global market and we do not want to disrupt that market.”

Bloomberg on Friday reported that “the administration is weighing a ban on U.S. imports of Russian crude oil,” and that “conversations are taking place within the administration and with the U.S. oil and gas industry on the impact such a move would have on American consumers and the global supply,” citing unnamed “people familiar with the matter."

An expert at GasBuddy told ABC News on Thursday that banning Russian oil imports would, in fact, likely raise gas prices in the U.S.

Psaki said there wasn’t any “outside event” for which the U.S. was waiting to implement a ban, but that the White House was “mindful of not taking steps” that would raise energy prices for Americans and that the U.S. also wanted to take steps in concert with allies.

There would be a much larger impact on energy prices in Europe, which is a lot more reliant on Russian oil, according to experts.

-ABC News' Ben Gittleson

Russia's state censor, Roskomnadzor, added Twitter to its list of banned sites in the country on Friday, following a request from the Russian prosecutor general.

Earlier Friday, Roskomnadzor banned Facebook as the Russian government moves to limit dissent over the war in Ukraine.

-ABC News' Patrick Reevell

Russia's representative to the United Nations on Friday reiterated the Kremlin's claim that Ukrainian forces were responsible for the attack on the Zaporizhzhia nuclear power plant.

The representative said Russian forces came under small arms fire by a "Ukrainian sabotage group" that was stationed in a training complex building on site.

The representative claimed that Russian troops returned fire, but that as they departed, Ukrainians set the building on fire.

The Russian representative claimed Ukrainian "radicals" are under the West's "close guardianship and protection," giving them "carte blanche," and allowing them to act like "ISIS terrorists" by "hiding behind civilians and placing heavy weaponry and multiple rocket launchers in residential areas."

Ukraine, the U.S. and its allies have denied these claims.

The UN relief chief also fact-checked the Russian delegate on Monday, saying Russia's claim about Ukraine placing weapons in civilian areas was false.

- ABC News' Conor Finnegan

The United Nations High Commissioner for Human Rights has "received credible reports of several cases of Russian forces using cluster munitions, including in populated areas," spokesperson Elizabeth Throssell said Friday.

"Due to their wide-area effects, the use of cluster munitions in populated areas is incompatible with international humanitarian law principles," Throssell said.

Throssell added, "We remind Russian authorities that directing attacks against civilians and civilian objects as well as so-called bombardment in towns and villages and other forms of indiscriminate attacks are prohibited under international law and may amount to war crimes."

To date, there have been 26 attacks on health care facilities in Ukraine, killing at least 12 people and injuring 34 people, according to Jašarević. Two of those killed and eight of the injured were healthcare workers.

That number is "shocking," said Throssell.

Throssell and WHO spokesperson Tarik Jašarević declined to pin the blame for all of them on Russia.

This number of attacks includes Wednesday's strike on a children's hospital and maternity ward in Mariupol. On Thursday, Russian officials claimed that the attack was staged, but they first confirmed they bombed it and claimed the hospital was being used by Ukrainian "radicals."

Throssell told reporters that is not true; "It was a functioning hospital," she said.

-ABC News' Conor Finnegan