PHOENIX — North High School's head varsity football coach is on administrative leave after "inappropriate behavior" occurred between students, according to a letter sent to parents from the district.  

The Phoenix Union High School District confirmed Friday that Adan Mendoza is under investigation. 

The letter from the Phoenix Union High School District says the district is investigating after school officials "became aware of concerns about inappropriate behavior that allegedly occurred between students in the boys' locker room."

The district is investigating a video that may be related to the incident, the district said Monday. School officials said the video allegedly includes students from North High School and it was reportedly filmed on campus.

"We take all reported allegations seriously and have launched an investigation.  As a part of the investigation, we are working with local authorities to determine the extent and severity of the reported behaviors," the district said in the letter. 

North High School Football Coach Letter
Phoenix Union High School District

The district said Friday morning that they reached out to all the parents of the students potentially involved. 

"If we believe that more students were involved, we will reach out individually to parents and families. The investigation is active, and we will provide updates as appropriate," the letter said. 

The investigation is still active. At this point, the district is "unable to determine the extent and severity of the behavior," the letter said. 

The district says Mendoza is also a physical education and health teacher. His leave extends to his duties as a coach and classroom teacher. 

Phoenix PD confirmed there is an investigation involving students from North High School. Detectives still have several people to interview, according to a police department spokesperson. 

The football banquet that was scheduled for Friday was postponed. A new date hasn't been set yet.