The London headquarters of Fox boss Rupert Murdoch were raided by investigators working for the European Commission, the Telegraph reports. The headquarters house Fox's broadcast operation.
"Sources at the location told the newspaper that authorities were trying to be discreet and had been told to keep details of their mission confidential," according to CNBC.
The investigators will work throughout the day on Wednesday and maybe into Thursday, the report said.
Fox told CNBC that it was "cooperating fully with the EC inspection."