Central African Republic's Seleka rebels, who once overthrew the government, say they're entitled to a $5 million reward from the U.S. government because they say they handed over a wanted international war crimes suspect.

Dominic Ongwen, a commander of the Ugandan rebel group Lord's Resistance Army, is now in custody of the International Criminal Court and is expected to be flown later Monday to The Hague for trial on war crimes charges.

The Seleka rebels say they captured Ongwen and then handed him over to American forces in Central African Republic.

Mounir Ahamat, a Seleka officer in the Sam-Ouandja area, said Ongwen introduced himself as "Moussa" and only later did the rebels learn they had handed over an international war crimes suspect with a bounty on his head.