He was volunteering as a fishing guide at church camp.

A Minnesota sheriff's deputy is accused of having sexually abused several boys while volunteering as a fishing guide at a church camp last month.

Mille Lacs County Deputy Aaron Heuer is charged in Otter Tail County with four counts of first-degree criminal sexual conduct and four counts of second-degree criminal sexual conduct.

Prosecutors allege that Heuer had sexual contact with four boys while volunteering at the Lutheran Island Camp near Henning last month, KFGO-AM reported.

Schan Sorkness, the camp's board chairman, said in a statement Tuesday that camp administrators were appalled by the allegations and "profoundly saddened" that campers could have been hurt by an adult in a trusted position.

The spiritual and physical wellbeing of our campers is our single most important priority. We are fully cooperating with the authorities on the ongoing investigation," Sorkness wrote. He said Heuer served as a guide at the camp from June 9 through June 21.

Investigators said the alleged victims were from 8 to 10 years old. KBRF-AM reported that several additional incidents were alleged to have happened on a separate fishing trip in Aitkin County.

Heuer was placed on administrative leave. He has been with the Mille Lacs County sheriff's office for six years. His next court appearance is set for Aug. 5.