U.S. authorities seized nine failed banks on Friday, the most in a single day since the financial crisis began and the latest stark sign that substantial parts of the nation's banking industry are being crippled by bad loans.

The move brought the total number of failed banks in 2009 to 115 -- their highest annual level since 1992 -- with analysts expecting more to come. Among the lenders seized Friday was Los Angeles-based California National Bank, in what was the fourth-largest U.S. bank failure this year.