U.S. District Judge Naomi Reice Buchwald ruled yesterday that investors suing banks over Libor rate manipulation may refer to last month's settlement involving Barclays Plc as they seek to fend off the banks' requests to dismiss the claims, Bloomberg News reported yesterday. Judge Buchwald told lawyers that she will not delay a motion to dismiss claims that the banks violated U.S. antitrust law by suppressing the Libor rate, which is used to set interest rates on trillions of dollars of investments. The investors, led by the mayor and city council of Baltimore, had asked Judge Buchwald to delay the motions to dismiss and allow them to file an amended complaint including information that has become public as a result of the Barclays' settlement.