A martial arts instructor in Detroit Lakes, Minn., has been charged with sexually assaulting two girls.

Patrick D. Fineday, 65, was to appear Monday afternoon in Becker County District Court in connection with the alleged assaults that went on for years until last fall.

Fineday is charged with first-degree criminal sexual conduct and remains jailed in lieu of $100,000 bail.

Fineday's studio offers instruction to a full range of age groups, including children, according to the studio's newspaper ads. Should he post bail, conditions of his release include that he have no contact with anyone younger than 18 years old.

According to the criminal complaint:

An 11-year-old girl who was not a martial arts student told the Sheriff's Office that Fineday had been sexually abusing her for about the past five years at his home in Detroit Lakes.

Fineday admitted to police that he assaulted the girl. He also admitted to sexually abusing another girl when she was 12 years old.