San Diego is asking a state court to block mortgage lender Countrywide Financial from foreclosing on subprime borrowers. The civil complaint filed in San Diego County Superior Court claims Countrywide engaged in predatory lending by selling borrowers loans they could not repay and failing to adequately explain the risks of adjustable-rate loans. The complaint names Countrywide and its new owner, North Carolina-based Bank of America, along with four former executives and unnamed loan officers and securitization agents. The bank is facing similar suits from the states of California and Illinois.