NEW YORK (AP) Depositors withdrew savings and investors broadly sold off bank shares Monday as the federal government raced to reassure Americans that the banking system was secure after two bank failures fed fears that more financial institutions could fall.

President Joe Biden insisted that the system was safe after the second- and third-largest bank failures in the nations history happened in the span of 48 hours. In response to the crisis, regulators guaranteed all deposits at the two banks and created a program that effectively threw a lifeline to other banks to shield them from a run on deposits.

Your deposits will be there when you need them, Biden told the public, seeking to project calm. He also said the banking executives responsible for the failures would be held accountable.

In other developments, the Federal Reserve announced that it would reassess its supervision of Silicon Valley Bank .

We need to have humility and conduct a careful and thorough review of how we supervised and regulated this firm, and what we should learn from this experience, said Michael Barr, the Feds vice chair for supervision, who will lead the effort.