Biden convened a national security council meeting this morning on Ukraine

US President Joe Biden convened a meeting of the National Security Council Thursday morning in the Situation Room to discuss the latest developments in Ukraine, a White House official said.

As CNN reported, a number of top national security officials arrived at the White House earlier this morning. CNN observed national security adviser Jake Sullivan, Treasury Secretary Janet Yellen, Chairman of the Joint Chiefs of Staff Gen. Mark Milley, Defense Secretary Lloyd Austin, CIA director Bill Burns, and Vice President Kamala Harris arriving at the West Wing in the 7 a.m. ET hour.

CNN reported that Biden, vowing the world will “hold Russia accountable” for the attack underway in Ukraine, will spell out a set of sanctions on Thursday once meant to deter such an assault.

Set to address the nation at 12 p.m. ET, Biden is expected to unveil new measures that could cut off Russia from advanced technology, announce new restrictions on large financial institutions and slap sanctions on additional members of the inner circle of Russian President Vladimir Putin.