NBC News – A Boston driver was killed Friday morning by a flying manhole cover on Interstate 93.
Massachusetts State Police say the manhole cover became dislodged and flew through the windshield of a car, killing the woman behind the wheel.
MassDOT is investigating what caused the manhole cover to come loose.
Manhole covers like the one in Friday's accident weigh in excess of 200 pounds.
State Police say the victim is a woman, but are not releasing her name until her family can be notified.
Investigators are reviewing surveillance footage of the area to see whether they captured the incident, according to State Police.
They also plan to examine the manhole cover for excessive wear, deformation or anything else that could have made it go airborne.
Investigators also plan to examine damage on the car to learn where the manhole struck the car and the distance it traveled before impact, State Police said.
State Police are also interviewing witnesses and drivers who called 911.