A campus police officer at the University of Colorado at Colorado Springs has been arrested on suspicion of trying to arrange sex with a 13-year-old girl and her mother.

Todd Vecellio of Colorado Springs was arrested Wednesday.

Authorities say an undercover officer posing as the mother had been communicating with the 38-year-old Vecellio since mid-August by e-mail and phone.

Vecellio told arresting officers he was investigating the woman. Police say there's no evidence for that claim.

Vecellio is being held for investigation of criminal solicitation, sexual assault on a child and sexual exploitation of a child. Bail was set at $50,000.

Jail officials didn't know whether he had an attorney. Vecellio had no listed phone number.