The International Cricket Council says there is no evidence that the third Ashes Test had been "corrupted", following allegations of spot-fixing.
The Sun newspaper published purported evidence of bookmakers offering to sell details of passages of play for betting purposes, so-called spot-fixing for the match between Australia and England in Perth that started on Thursday.
A man, who the newspaper claims is a bookmaker, says in undercover video footage: "Before match, I will tell you this over, this runs and then you have to put all the bets on that over [sic]."
ICC anti-corruption unit general manager Alex Marshall has launched an investigation.
"From my initial assessment of the material, there is no evidence, either from The Sun or via our own intelligence, to suggest the current Test match has been corrupted," Marshall said in a statement.
"At this stage of the investigation, there is no indication that any players in this Test have been in contact with the alleged fixers.
"The allegations are wide-ranging and relate to various forms of cricket in several countries, including T20 tournaments. We will look closely at all the information as part of our investigation.
"Nothing has been referred as yet because we are still assessing the information. If we deem that offences have taken place in countries where match-fixing is illegal then we will work with the local police and report our concerns and share information to push for prosecution."
Cricket Australia said it will cooperate with the ICC's investigation, while an ECB statement said: "There is no suggestion that any of the England team is involved in any way."