NORMAN, Oklahoma - Police were investigating after they received a report of a threat against Norman North High School.

Investigators determined Friday afternoon the threat was not credible.

While investigators were looking into the threat, police increased their presence at the school and the surrounding area throughout the day.

This is the second day of school for Norman Public Schools and the second school to be threatened in the last week.

Stay with News 9 and News9.com for more information as it becomes available.