NEW : Some U.S. lawmakers are concerned Three victims may have had their phones hacked . NEW : The concerns appear linked to a tabloid report . Three senators , a congressman ask News Corp. to investigate Justice Department A second senator tells Justice Department he may launch his own investigation .
NEW : Some U.S. lawmakers are concerned 9/11 victims may have had their phones hacked . NEW : The concerns appear linked to a tabloid report . Three senators , a congressman ask Justice Department to investigate News Corp. A fourth senator tells CNN he may launch his own investigation .