Prediction market platform Polymarket issued an apology for allowing users to place bets on the fate of American pilots aboard a U.S. fighter jet downed over Iran.

A two-seater F-15E Strike Eagle was shot down on Friday, according to a U.S. official. One crew member was rescued, but the other remains missing.

In a since-deleted market, users were able to wager on when the pilots might be rescued, with the majority predicting a Saturday rescue.

“US confirms pilots rescued by…?” the market read.