The unexpected seizure of two banks in three days by regulators intensified fears of a broader financial crisis, sending the stocks of more than two dozen banks into free fall on Monday, even as U.S. President Joe Biden reassured Americans that the banking system was resilient and that customers’ money was safe.

Banks of various sizes in different parts of the country — from San Francisco-based First Republic Bank to Salt Lake City-based Zions Bank — found themselves battling market turmoil as customers rushed to withdraw their deposits and investors, worried about more runs, dumped bank stocks.

In a brief televised statement from the White House shortly before the U.S. markets opened, Biden said the government was responding decisively to the collapse of Silicon Valley Bank and Signature Bank in ways that would protect depositors without rewarding risk-taking executives and investors.