Goldman Sachs announced Thursday that it will be shutting down its operations in Russia.

“Goldman Sachs is winding down its business in Russia in compliance with regulatory and licensing requirements," Goldman Sachs said in a statement.

The company added, "We are focused on supporting our clients across the globe in managing or closing out pre-existing obligations in the market and ensuring the wellbeing of our people."

-ABC News' Victor Ordoñez

Samaritan’s Purse opened an outpatient clinic just outside the train station in Lviv on Thursday and has already treated its first patients.

Some people have evacuated so quickly they left their homes without their medicine -- and by the time they made it to Lviv they were in desperate need, Mark Agness, an emergency room doctor from California, told ABC News. Pregnant women and newborns are also common.

"That’s why we do this … it’s really the parable of the Good Samaritan. Help thy neighbor -- well they’re my neighbor," said Agness.

Chelsea Musick, a nurse from Iowa, has been with the organization for years and said working in Ukraine is different. Unlike other humanitarian disasters, this was entirely man made, she said. She described the patients she’s seeing as having a "haunted" look in their eyes.

Samaritan’s Purse is also building a large field hospital, which they expect to be operational by the weekend, in the parking garage of a local mall, a few minutes away from the train station. The hospital will have enough room for 15 surgeries a day and will be able to increase beds as needed.

The operation is primarily funded by individual donors from the U.S., the organization said. Two airlifts of supplies have already been coordinated from the U.S.

-ABC News' Irene Hnatiuk, Maggie Rulli and John Templeton

In a college gym-turned-shelter, Kyrill Nodikov, a Ukrainian poet who has been published in Ukraine and Russia, told ABC News he and his 20-year-old son are ready to enlist in the war.

Nodikov was seeking refuge in a shelter with his wife, their three kids, a dog and a tabby cat.

There are thousands of families struggling with the same dilemma: whether to take their animals, which makes their exodus far more complicated, or leave them behind. Most have stayed loyal to their animals.

When asked what it would be like to take care of her twins and pets by herself, Oksana, Nodikov's wife, started crying.

Sitting on mats on the floor of the gymnasium, the family gathered in a huddle, hugging, holding and comforting Oksana. And then they did the Ukrainian version of a pinky promise: hooking their pinkies and saying, “Peace, friendship, bubble gum."

-ABC News' Matt Gutman, Brandon Baur and Scott Munro

Russia-backed forces have allegedly seized several neighborhoods in Mariupol amid an ongoing operation to "liberate" the southeastern Ukrainian port city.

"The operation to liberate the city of Mariupol of nationalists has been continuing," Russian Ministry of Defense spokesman Igor Konashenkov said at a press briefing. "Donetsk People's Republic militia units have taken control of the neighborhoods of Azovsky, Naidenivka, Lyapyne, and Vynohradar and approached the Azovstal plant. The western neighborhood in the western part of the city has been liberated."

The self-declared Donetsk People's Republic is one of two Russia-controlled separatist areas in eastern Ukraine's Donbas region.

U.S. Secretary of State Antony Blinken crossed the border into Ukraine Saturday after meeting with Ukrainian Foreign Minister Dmytro Kuleba at the Korczowa Border Crossing Point.

"The entire world stand with Ukraine," Blinken said, and Kuleba added that he hopes Ukrainians will see this as a "clear manifestation that we have friends who literally stand by us."

Blinken said the sanctions imposed so far against Russia are "producing very, very concrete results" and that the pressure will "grow" until this "war of choice is brought to an end."

When asked directly about helping Kuleba with more firepower, Blinken said, "the support for Ukraine not only has been unprecedented, not only is going to continue, it's going to increase."

Kuleba said Ukraine "appreciates" sanctions that have been announced in the last week, but that more economic and political pressure and "necessary weapons," would "save many lives in Ukraine... many sufferings will be avoided."

Kuleba also said that they are “satisfied" with already arranged supplies of anti-tank weapons and ammunition, but that “it’s no secret” they still want fighter jets and air defense systems.

He also thanked the U.S. for sending stingers, and said they were used on Saturday.

"Just today we shot down three Russian attack aircrafts, which were bombing our cities with the use of stingers but we need -- so to say -- big air defense systems to ensure the safety of our skies. If we lose the skies, there will be much, much more blood on the ground,"Kuleba said.

In response to questions about NATO’s refusal to impose a no-fly zone over Ukraine, Kuleba said it’s a "sign of weakness," but stayed optimistic that they will change their minds.

"The time will come," he said.

-ABC News' Conor Finnegan and Justin Gomez