LEAVITTSBURG, Ohio - LaBrae High School was on lock down while administrators conducted a drug search after two adults and two juveniles entered the building Thursday morning.
Of the four people, only one was a student at the high school and one was recently released from prison in Chicago for burglary.
Police said the four entered the building when students were arriving for class.
One of the juveniles was given alcohol by one of the adults while on school property.
Emergency procedures were enacted when teachers noticed them in the building and police responded in approximately one minute.
All four were taken into custody.
Robocalls went out to parents informing them of the situation.
All of the school district's buildings were locked down while police with dogs searched for weapons and drugs, but none were found.
It's not clear what the individuals were doing in the building.