Two junior high school teachers in Utah have been arrested for allegedly sexually assaulting the same 13-year old boy, according to a newspaper report.

The inappropriate student-teacher relationships involved Utah studies teacher and cheerleading adviser Linda R. Nef, 46 and Valynne Bowers, 39, a math teacher, the Salt Lake Tribune reported.

Both Bountiful Jr. High teachers did not know the other was carrying on an affair with the student until recently, Bountiful Police Lt. Randy Pickett told the Tribune.

Nef reportedly met with police and said that she had been having sex with the boy for over a year, police said. She then told police about the boy's subsequent relationship with Bowers, who later confirmed it.

Pickett, the police lieutenant, said the teachers exchanged sexual text messages with the boy and that led to phone sex and later, assault.

The assaults occurred off campus, he said.