Big rig truck driver found unresponsive after crash along Mass. Pike in Grafton

The driver of a big rig truck apparently drove off the road on the Mass. Pike in Grafton overnight, and was found unresponsive by emergency crews, according to Massachusetts State Police.

State troopers said they responded shortly after 1 a.m. to the crash on the eastbound side of the highway, where they found the tractor trailer in the wood line with "no sign of the operator."

Eastbound traffic was diverted off the highway at Exit 96 for police to look for the driver and clear debris.

The driver of the truck was found unresponsive, police said. The truck driver, as well the driver of a second vehicle involved in the crash, were both taken to a local hospital.

Their conditions are unclear as of Monday morning.

An investigation into the crash is underway.

The Pike was reopened to normal traffic at around 5 a.m. The truck is expected to be removed later in the day to minimize disruptions to commuters.