Nine people were taken to area hospitals after a crash Friday on Interstate 95 that involved a charter bus, according to Rich Gardiner, spokesman for the Harford County Fire and EMS Association.
The bus was headed southbound when it ran off the road between the Havre de Grace and Aberdeen exits on I-95.
Patients were taken to four hospitals in Harford, Baltimore and Cecil counties, Gardiner said.
Forty-eight teachers from Newark, DE, had been passengers on the bus and those who received medical treatment had injuries that were "minor in nature," WBAL TV reported.
The crash occurred when the bus driver fell asleep and struck the guardrail, according to WBAL TV, which reported that the driver was cited for negligent driving and driving while fatigued.
Multiple lanes were closed on I-95 south in the hours after the crash, according to Maryland Department of Transportation.
This article was updated at 11:35 a.m. and 10:25 p.m. on Friday.