A Howard County bus driver ran her schoolbus, carrying students, off the road while she was under the influence of drugs, police said.

No one was seriously injured when the bus left the road and hit a mailbox and a water runoff drain, county police said in their report on the crash.

The driver, Stacy Jean McKinney, 33, of Laurel, was charged with drug possession, driving while impaired and negligent driving. A court document said that she possessed a drug other than marijuana but did not name the substance.

The crash happened Tuesday afternoon on Whiskey Bottom Road.