ETNA, Ohio (AP) — An emergency official says a charter bus carrying students from a high school was rear-ended by a semi-truck on an Ohio highway, leaving three people dead and 18 others injured. Licking County Emergency Management Agency Director Sean Grady says the charter bus was transporting students from from the Tuscarawas Valley Local School District in eastern Ohio. There were a total of 57 people onboard. The Ohio State Highway Patrol confirmed that people were killed in the crash but declined further comment since they were still notifying the victim’s families. The accident occurred shortly before 9 a.m. Tuesday on Interstate 70 West in Licking County, near the Smoke Road underpass. The cause wasn’t immediately known.