Six people have been arrested on suspicion of fixing British football matches, including at least three current footballers.
Police are investigating an Asian betting syndicate, with the National Crime Agency arresting the six men in the last two days.
One of the people arrested is understood to be a former Premier League footballer who now works as an agent.
The investigation follows an undercover investigation by the Daily Telegraph newspaper, which recorded one alleged fixer offering to rig two games.
"These games, we understand, are outside the Premier League and outside the Football League, so right down in the lower leagues," says Sky News Sports Correspondent Paul Kelso.
In the undercover filming, the alleged fixer says: "So I talk to them. Double confirm. I also tell them, I tell?.this (is) what I want?Because simple I commit myself and they commit.
"So you tell me how many goals?Give me at least five. Ok I do need five. Either 3-2, 4-0, 4-1, I will say I do it for that, for me four is enough."
In another part of the secret filming the alleged fixer claims that the footballers are not difficult to persuade.
"What the players want ? they want the money," the man says.
"So for 90 minutes I pay them £7,000 ... definitely they take."
The cost of fixing games in England is "very high", the man in the video adds, saying that the usual rate to bribe the players is £70,000.
The Daily Telegraph says the alleged fixer backed up his claims by correctly forecasting the outcome of three matches by the same team.
