Farmington Hills Police conducted K-9 team sweeps at North Farmington and Harrison high schools today, as students remained locked in their classrooms.
Police Chief Chuck Nebus said Wednesday evening that, although the drug-sniffing dogs "hit" on three cars at each school, "I am pleased to report that no drugs were found at either school."
He added that four of the six students whose cars were identified by the K-9s admitted that marijuana had been inside their vehicles.
In a list serv email sent Wednesday afternoon, school officials said the lockdown was part of an "on-going effort to ensure a safe, successful learning environment" for students.
The note concluded, "We are grateful to our students and staff for their excellent response during the lockdown and to local law enforcement for their care, professionalism, and dedication."