ABERDEEN, S.D. (AP) — A South Dakota man charged with sexually abusing a child is denying any wrongdoing.

Twenty-seven-year-old Reuben James Flying Bye has pleaded not guilty to a federal charge of aggravated sexual abuse of a child.

The office of U.S. Attorney Randolph Seiler says the Little Eagle resident last month "knowingly engaged in, and attempted to engage in, a sexual act" with the child who is younger than 12 years old.

Authorities say the incident happened on the Standing Rock Indian Reservation, which straddles the North Dakota-South Dakota border.

U.S. Magistrate Judge William Gerdes on Wednesday determined Flying Bye must remain in custody until his trial because "young children are often at the home" where the defendant would have stayed. The trial is scheduled to begin Aug. 23.

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