A drug-sniffing dog alerted once during a scan of lockers and the parking lot at Fallston High School Tuesday, but no drugs or tobacco were found.

A dog, under the direction of the Harford County Sheriff's Office, scanned 320 lockers in six minutes, from 8:08 to 8:14 a.m., and 29 vehicles in the school's parking lot in 19 minutes, from 8:17 to 8:36 a.m. The dog did not alert on any lockers and alerted once on a vehicle in the parking lot. No drugs or tobacco products were found.

The dog was accompanied by four sheriff's deputies, two school administrators and the school system's director of internal investigations. The scans are part of the school system's commitment to keeping illicit drugs out of the schools.