Professional Fighters League Challenger Series event flagged for suspicious betting activity after league said fights were pretaped

Bettors who wagered on a mixed martial arts event that was billed as a live broadcast on April 1 found their accounts under review over the weekend after an integrity monitor flagged suspicious betting activity and the Professional Fighters League said the fights actually took place a week earlier.

FuboTV promoted the Friday broadcast of the PFL Challenger Series as live at 9 p.m. ET, and the PFL tweeted Friday evening that the «Fighters are in the building for TONIGHT.» Odds on the Challenger Series moved significantly in favor of each of the winning fighters Friday afternoon, ahead of the broadcast.

On Saturday, U.S. Integrity, a Las Vegas-based company that monitors betting markets, sent an alert to sportsbooks saying it confirmed with the PFL that the fights were pre-taped on March 25.

«As such, it's very possible that any potentially suspicious wagering activity is indicative of nefarious behavior,» U.S. Integrity wrote in the alert, obtained by ESPN, and recommended that sportsbooks that offered wagering on the event notify state regulators.

Sportsbooks contacted by ESPN said they are looking into the matter, and some books have not settled bets on the event while they are reviewing what happened. The Arizona Department of Gaming is removing the PFL from its wagering catalogue, the state's event wagering and fantasy sports administrator told ESPN in an email. The Colorado Division of Gaming said they are investigating the matter, and the Nevada Gaming Control Board and New Hampshire Lottery said they're aware of the situation. The New Jersey Division of Gaming Enforcement declined comment.

In a statement to ESPN on Monday, PFL spokesperson Loren Mack said Friday's broadcast was the first time in its history that an