Wireless provider Sprint Nextel Corp. said Monday it was suing private investigative firm San Marco & Associates, claiming it gained illegal access to the phone call records of its customers.

Sprint charged the company with illegally accessing confidential cell phone numbers and selling the information to online data brokers. Sprint is requesting temporary and permanent injunctions against the St. Petersburg, Fla.-based firm.

Sprint filed the suit Friday in a U.S. District Court for the Middle District of Florida, in Tampa.

Also Monday, Sprint said it secured a permanent injunction against First Source Information Specialists Inc. based on a complaint filed in January. Sprint said that under the injunction, First Source no longer is permitted to obtain, sell or distribute call records of Sprint customers.