Federal prosecutors in Manhattan are exploring whether certain lucrative bets placed on prediction markets have violated insider trading and other laws, multiple sources told CNN.

FOX, CNBC, and CNN now have Kalshi forecasts integrated into their platforms. Fox Corp. has announced plans to partner with Kalshi to integrate the prediction market’s data across the media giant’s various cable networks.

Prediction site Kalshi is partnering with CNBC, days after striking a deal with CNN. Prediction sites are popular but getting regulatory pushback.

Arizona’s attorney general has filed the first-ever criminal charges in the US against a major prediction market company, accusing Kalshi of running an illegal gambling operation in violation of state law.

The prediction market already has deals with CNN and CNBC.