Troubled by unexplained cash surpluses at the San Antonio branch of the Federal Reserve Bank of Dallas and its member banks, Rep. Henry Gonzalez, D-Texas, Monday called for hearings on money laundering and tougher legislation to trace drug profits.

"For over a decade I've sought an explanation to the persistent cash surpluses," Rep. Gonzalez said in a statement. "But neither law enforcement agencies nor bank regulators have provided me anything other than anecdotes and speculation."

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