Howard County police are investigating a single-vehicle collision in Columbia in which a school bus overturned.
At approximately 3:33 p.m. police responded to the 7300 block of Old Columbia Road for an overturned school bus. The bus was traveling northbound when it left the roadway for an unknown reason. No other vehicles were involved. There were no indications of driver impairment.
Of the 19 Hammond Middle School students on the bus, two males and two females, ages 11-14, were transported to the hospital for a checkup. The driver, a 30-year-old female, was not injured.
The cause of the collision remains under investigation.