Citigroup Inc., Bank of America Corp. and Wells Fargo & Co. said in annual reports filed in recent days that they could face $6.7 billion in litigation-related losses in coming years beyond the amounts they have set aside in reserves. None of the banks foresaw any such losses in their filings last year, Fortune reported.

The biggest potential hit is at Citigroup, which says its losses could hit $4 billion as it defends cases that range from suits tied to the subprime mortgages mess to the Lehman Bros. bankruptcy to the underwriting of securities backed by U.S. home loans.

Bank of America said in its filing that its losses on legal cases could run $1.5 billion above funds it has reserved for the purpose. Because of its acquisition of Countrywide Financial Corp. and Merrill Lynch & Cos. Inc. during the financial meltdown, Bank of America has been spending considerable time and money dealing with cases tied to the housing bubble.

Wells Fargo says its losses could run as high as $1.2 billion.