The ICC said the latest probe was based on information passed on by British tabloid The Sun, which suggested a scoring pattern in Pakistan's innings was prearranged.
"A source informed The Sun newspaper that a certain scoring pattern would emerge during certain stages of the match and, broadly speaking, that information appeared to be correct," ICC chief executive Haroon Lorgat said in a statement.
The investigation comes on the heels of a previous fixing scandal on Pakistan's tour, when a player agent allegedly received money for organizing players to bowl no-balls at prearranged times in the final test against England last month so as to fix spot betting markets.
Pakistan's 23-run victory over England on Friday had kept the ODI series alive and initially shifted some of the attention away from the previous fixing allegations. But even before the match started at the Oval, the International Cricket Council was being told by The Sun that bookmakers in India and Dubai knew details of scoring patterns in Pakistan's innings and two suspect overs.
The Sun said it had passed on the information after it received details of calls between a notorious Dubai-based match fixer and a Delhi bookie.
"Cricket chiefs then watched as Pakistan's score mirrored the target that bookies had been told in advance by a fixer," the newspaper said.
The Sun's report said ICC officials began their investigations even before Pakistan's innings had ended, and that "it is not thought that the overall result was fixed, only scoring rates in parts of Pakistan's innings." The ICC said it would work with The Sun newspaper staff and sources to "ensure full truth surrounding this match is ascertained." London police said they are not involved with the investigation, while the England and Wales Cricket Board said it would meet Saturday to discuss the matter but that "we see the final two matches (in the series) going ahead at this stage." The Pakistan Cricket Board was also not commenting on the new allegations.
The earlier no-ball fixing allegations resulted in the ICC suspending Salman Butt, Mohammad Asif and Mohammad Amir while a fourth Pakistan player Wahab Riaz was questioned by Scotland Yard last week.
The London police force announced Friday that it had passed its evidence to prosecutors to consider charges.
That initial fixing controversy had triggered calls from some quarters for the remainder of the tour to be called off. The PCB's director general Javed Miandad wanted the entire team changed for the one-day series.
