Russia-Ukraine updates: US to ban Russian carriers from its airspace

The White House is not ruling out imposing restrictions on importing Russian oil and gas, White House press secretary Jen Psaki said in a briefing Monday afternoon.

"We haven't ruled out that," she said.

The sanctions announced this past week by the Biden administration did not directly hit oil and gas flows from Russia, which would deal a major blow to the energy market as the global economy continues to recover.

The White House has raised concerns about already high energy costs for Americans going even higher if this trigger is pulled.

Remaining "on the table" as well is the option to tap into the strategic petroleum reserve, though Psaki didn't have updates on that decision.

"There are conversations that we've been having with global partners, and obviously we have our own strategic petroleum reserve stockpile to tap into," she said.

When asked about Canadian Prime Minister Justin Trudeau's announcement that Canada would unilaterally ban Russian crude oil imports and whether the U.S. would make a similar move without coordination from European partners, Psaki repeated that "all options remain on the table."

"You have seen us take a number of actions over the last several days that play that out," she said. "But I don't have anything to predict at this point other than to reiterate that we have really worked to take steps in lockstep with the Europeans and a number of our NATO partners."

Psaki said the White House also continues to be in touch with Saudi Arabia to try and minimize the impact on energy markets across the world as the Russian invasion of Ukraine continues.

She would not say if the U.S. made any request to Saudi Arabia or OPEC+ members to increase production given the ongoing crisis.

"There is an ongoing discussion about steps that we can take to address volatility in the market," Psaki said.

-ABC News' Justin Gomez

The International Criminal Court is "opening an investigation into the situation in Ukraine, as rapidly as possible," the court's chief prosecutor, Karim A.A. Khan, announced Monday.

The court has "reasonable basis to believe" that war crimes and crimes against humanity were committed in Ukraine and is pursuing accountability, including possible prosecutions, Khan said in a statement.

An authorization from a pretrial chamber of the court and support and funding from the ICC's 123 member states will be required to begin an investigation.

Neither Russia nor Ukraine is a member of the court, but Ukraine has provided authorization for an investigation in its territory, Khan said.

The U.N. Human Rights Council also voted Monday to hold an urgent debate on Thursday, where they'll consider a draft resolution from Ukraine.

-ABC News' Conor Finnegan

Americans people should not be worried about the threat of nuclear war, President Joe Biden said Monday.

The president made the comment while leaving a White House event celebrating Black History Month, replying “No” when a reporter asked whether the country should feel worried.

The brief response to the question was Biden's only reference to the current situation in Ukraine, but Vice President Kamala Harris commented further on the situation unfolding in Eastern Europe.

"Today the eyes of the world are on Ukraine, and the brave people who are fighting to protect their country and their democracy," Harris said. "And their bravery is a reminder, a most recent reminder that justice, equality, and freedom must never be taken for granted by any of us."

On a call with allies Monday afternoon, Biden discussed "their coordinated efforts to impose severe costs and consequences to hold Russia accountable while working to maintain global economic stability, including with regard to energy prices,” according to a statement from the White House.

The U.S. sees "no reason" to change its own nuclear alert level, White House press secretary Jen Psaki said in a press briefing Monday afternoon.

“We are assessing Putin's directive and at this time we see no reason to change our own alert level,” she said.

-ABC News' Mary Bruce and Molly Nagle

Twelve Russian diplomats have been expelled from Moscow’s mission to the United Nations in New York, U.S. Ambassador Richard Mills, the deputy representative to the U.N., confirmed on Monday.

Those diplomats were engaged in activities not in accordance with their obligations and responsibilities as diplomats, Mills said.

They "abused their privileges of residency in the U.S. by engaging in espionage activities that are adverse to our national security," Olivia Dalton, spokeswoman for U.S. Ambassador Linda Thomas-Greenfield, tweeted Monday. The action to expel them “has been in the works for several months,” Dalton wrote.

Russian Permanent Representative to the U.N. Vasily Nebenzya in a Monday press conference in New York accused U.S. authorities of undertaking "another hostile action against the Russian Federation's mission to the United Nations" and of "grossly violating their commitments on the host country agreement that they undertook" with this move.

The expelled employees are now considered "personae non gratae" and were ordered to leave the U.S. by March 7, according to Nebenzya.

-ABC News’ Conor Finnegan and Tanya Stukalova