Parents of students in the Owasso schools got a text about a precautionary lockdown at the high school this morning.
Police say a student overheard a conversation this morning that seemed to be about a bomb threat.
The student reported what he or she heard to a school resource officer who relayed the information to police.
Owasso police spokesman Nick Boatman says, "The school was on lockdown for an hour and a half while police investigated."
Nothing suspicious was found and classes are now back to normal.