NEWCASTLE United, Portsmouth and Rangers were raided by the police overnight as part of an investigation into alleged corruption in football.
Police said the raids were not connected to Lord Stevens’ ongoing Quest inquiry into the English Premier League and were “totally independent”.
City of London Police would not disclose which clubs were involved, or their league status, but said search warrants were executed between 7.30am and 9am.
A spokeswoman said: “We can confirm that search warrants were served at three football clubs and the homes of two individuals in connection with corruption in football and its impact on owners and shareholders.
“This investigation is a totally independent inquiry.
“It has not been influenced or informed by the Quest inquiry in any way.
“As this is a live investigation, it would be inappropriate to comment further at this stage.”
Northumbria Police said all inquiries about the raids are being handled by City of London Police, but a spokesman for the north east force said it was that “an operation” had been carried out earlier by its London colleagues at St James’ Park, home of Newcastle United.
Rangers confirmed it had been approached by police.
A club spokesman said: “Rangers Football Club was asked to co-operate with the police investigation and have done so, extending every co-operation.
“We have been requested by police not to comment further while the investigation continues.”
Gary Double, Portsmouth’s director of communications, also confirmed his club was involved.
He said: “We can confirm that the police arrived at about 10am this morning.
“We have co-operated fully with their search and will not be commenting further.”
Newcastle plc issued a statement which read: “Newcastle United can confirm that it was visited this morning by the City of London Police.
“The club itself is not the subject of the investigation.
“If the investigation by the City of London Police, or the ongoing internal review of operations by the club’s new owners, show that the club has been the victim of any criminal activity, the club will take appropriate action.”