An Oklahoma man has been charged with sexually abusing boys and girls while volunteering at an organization in Kenya that assists neglected children.

Matthew Lane Durham, of Edmond, is accused of engaging in sex acts with children aged from 4 to 10 years while volunteering at Upendo Children's Home in Nairobi from April to June 2014.

The complaint filed in the U.S. District Court of Western Oklahoma last Thursday says the 19-year-old Durham has volunteered with Upendo since June 2012.

Court records show Durham wrote a confession that an Upendo official provided to the U.S. Embassy in Nairobi.

Upendo's founders have not responded to a phone call and email seeking comment.

Durham's lawyer told The Oklahoman that the complaint is inaccurate and his client is the victim.