Organizers of the Nobel Peace Prize, which announced its winner as Venezuelan opposition leader Maria Corina Machado, have been alerted to unusual betting activity favoring Machado as the winner.

The potential insider trading happened on Polymarket, a decentralized predictions marketplace that hit international headlines during the U.S. presidential elections in 2024. Users on the platform can place bets on various events, including politics, sports, and markets.

Odds of Machado winning on the predictions platform had jumped from under 2% to well over 70% in the hours ahead of her victory.