1 inmate struck and killed, 3 others injured on I-70 westbound in Frederick County

One inmate working on a road crew was killed and three others were injured when they were struck by a vehicle on I-70 in the Myersville area in Frederick County on Tuesday morning.

Investigators say a red freightliner tractor trailer was traveling west on I-70 when it went off the road near Route 17 and struck a van owned by the Maryland Department of Public Safety and Correction Services.

They say six inmates were working on the side of the highway when the tractor trailer plowed into the van, striking at least two inmates.

Two other inmates were injured by debris.

A 34-year-old inmate was killed.

A 24-year-old inmate was taken to a local hospital with serious injures.

Two other inmates' injuries were not serious, according to police.

Corrections officials have not identified the inmates, nor have they indicated what the injured inmates' conditions may be.

The inmates, who are out of a facility in Hagerstown, were approaching their release dates.

A third vehicle - a dump truck - swerved to avoid the crash and jack-knifed. Its fuel tanks were damaged, prompting HazMat crews to respond to the scene.

The crash is still under investigation.