A federal search warrant is being executed at the headquarters of Petters Group Worldwide, which has Sun Country Airlines and Polaroid among its holdings. FBI spokesman Paul McCabe confirmed Wednesday that the FBI, the U.S. Attorney's Office, the IRS criminal investigative division and the U.S. Postal Inspection Service were all part of an ongoing investigation. He says agents on Wednesday were executing the search warrant at 4400 Baker Road in Minnetonka, which is where Petters Group Worldwide is located.