A substitute bus attendant in Maryland is accused of sexually assaulting three young students considered special needs.

The Washington County Department of Social Services contacted Hagerstown police last week alleging a fill-in school bus attendant had been inappropriately touching several students on the school bus.

A child crimes investigation began immediately with Washington County Public School officials. After reviewing video from May 5, police arrested 71-year-old Michael Sowers of Hagerstown.

In a statement, police said footage showed him sexually assaulting three students, two boys and a girl. All were considered special needs students and ranged in age from five to nine years old.

Sowers was arrested Friday and faces numerous sex offenses, including a rape charge.

Hagerstown police are now searching for additional victims.