HOWLAND — Maine State Police say two people killed in a crash on Interstate 95 were not wearing seat belts, and the driver of the vehicle likely fell asleep.

Police say the 63-year-old driver, Michael Dentico, of Arundel, died at the scene of Monday’s crash in Howland.

A passenger, 66-year-old Jacqueline Gordon, of Ellsworth, died on the way to a hospital.

Police say a second passenger, 43-year-old Tammy Dentico, of Arundel, suffered minor injuries.

Witnesses told police the vehicle, a pickup truck, drifted into the median before veering back across both lanes of traffic and into a ditch on the side of the road. The truck then overturned, throwing Gordon and Michael Dentico from the vehicle.

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