Russia-Ukraine updates: Putin says 'certain positive movements' in negotiations

The U.N. Security Council met again this afternoon to discuss Russia’s war against Ukraine and the growing humanitarian crisis.

U.N. relief chief Martin Griffiths briefed the council, warning that U.N. agencies are being overwhelmed.

“Make no mistake. We are unable to meet the needs of civilians today,” Griffiths said. “We’re failing to meet the needs of civilians today at this time. I hope we will not fail them tomorrow.”

President Joe Biden’s envoy to the U.N. Linda Thomas-Greenfield said in the meeting that 100 Ukrainian refugees cross into Poland every minute.

Griffiths urged both sides to take “constant care to spare civilians and civilian homes and infrastructure,” including safe passage for civilians to leave war zones and allow aid to come in. He also said the U.N. was working with Russia to set up a humanitarian notification system to ensure aid can be delivered safely and at scale.

“Simply put, millions of lives shattered. People can’t stay home with shops shut, power and water cut, shells falling, phones switched off. They can’t find what they need, even if they have money to pay for it. And as we have seen, even as the TV cameras roll, many can’t flee in safety either in this conflict,” he said. “It’s been 11 days of escalating violence, fear, and pain.”

-ABC News’ Conor Finnegan

After Ukrainian President Volodymyr Zelenskyy told ABC News’ David Muir that he believes President Joe Biden can do more to facilitate getting Polish fighter jets to Ukraine, the Biden administration said it is ultimately up to Poland.

“This is Poland’s sovereign decision to make,” White House press secretary Jen Psaki told ABC News’ Cecilia Vega. “We have in no way opposed Poland transferring planes to Ukraine.”

Psaki said there are “practical questions” to consider, such as how the planes would be transferred and where they would depart from and land. She also noted that procuring new planes and transferring serious weapons systems often takes years -- so a speedy transfer would represent a major challenge.

Vega asked Psaki if it was just logistical issues or whether Biden was concerned that supplying planes to Poland would “exacerbate the conflict.”

The press secretary said there are logistical challenges and that they’re “looking at all of those factors.”

“But we are not certainly preventing or blocking or discouraging Poland,” Psaki said. “That is, they are a sovereign country. They make their own decisions, but it is not as easy as moving planes around.”

-ABC News’ Sarah Kolinovsky

New York City has gone from a "high alert" to an "ultra-high alert" for potential cybersecurity attacks on critical city infrastructure following the Russian cyber-aggression in Ukraine, a New York Police Department official said Monday.

NYPD Deputy Commissioner John Miller said during a news conference that normally the city is on "high alert" for cyberattacks, but a difference between "high" and "ultra-high" alerts is that they can attribute possible cyber threats to "state actors." When tensions rise between the United States and Russia, so does the threat for tactical and strategic cyberattacks, Miller said.

Sen. Kirsten Gillibrand, D-New York, who was also at the news conference, said that a cyberattack against the Metropolitan Transportation Authority Metropoliltan Transportation Authorityin> New York last April raised concerns over potential vulnerabilities of the city’s infrastructure cyber protection. With ongoing Russian cyberattacks against Ukraine, the level of risk domestically is now "as high as I've ever seen it," Gillibrand said.

"There is no guarantee that those attacks will be limited to Ukraine," Gillibrand said. "The decision to impose sanctions on Russia puts the country at an increased risk that Russia will carry out retaliatory cyberattacks, particularly against New York state infrastructure and individuals."

When asked during the news conference if there have been any potential direct Russian cyberattacks against New York, New York City Chief Technology Officer Matthew Fraser said, “we have seen an uptick [in cyber threats], but we are not aware of any campaign that's explicitly targeting the city itself."

-ABC News' Victoria Arancio

A senior U.S. defense official said on Monday that Russian President Vladimir Putin has committed nearly "100% of his combat power" into Ukraine.

"We now assess that Mr. Putin has committed nearly 100% of his combat power into Ukraine. And by combat power, I mean that combat power that he had amassed along the border with Ukraine and in Belarus," the defense official said.

The official also said reports that Russia is attempting to recruit Syrians to sign up and fight in Ukraine appear to be accurate.

"We find that noteworthy that he (Putin) believes that he needs to rely on foreign fighters to supplement what is a very significant commitment of combat power inside Ukraine as it is," the official said.

The official said Russia has launched more than 625 missiles against Ukraine since the invasion began on Feb. 4. He said Russia has increased its use of "long-range fires" to compensate for a lack of movement in its forces on the ground.

"So, we certainly have noticed increases in what we call long-range fires -- bombardment, rocket attacks, artillery, as well as missile strikes," the official said.

-ABC News' Matthew Seyler