A lawsuit filed last week by the city and county of San Francisco against BankAmerica Corp. "may only be the tip of the iceberg," according to the city attorney's office.

Alleging that BankAmerica mishandled municipal bond funds, charged inappropriate service fees, and committed other improprieties, the city is suing BankAmerica for $12 million to $17 million in damages. But the bank could be liable for more than $100 million in damages, the city said last week.

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