A school bus driver from Merrill, Wis is under investigation for allegedly “sexting” an 11-year-old passenger, The Associated Press reports.

Authorities arrested 51-year-old Bobb Bergman and charged him with four felonies after he reportedly sent nude photos of himself to the boy, AP reports. He has since posted bail.

Bergman allegedly sent photos of his genitalia to the boy’s cell phone, according to police report obtained by AP. He also reportedly asked the young boy to collect cell phone numbers of other students on the bus.

No information is known if Bergman is still employed by the school district or bus company.