CRAWFORD COUNTY, MI -- A woman was killed and four children were injured in a rollover accident Sunday morning.

Crawford County Deputies said the accident occurred shortly after 9 a.m. on I-75 near the Otsego-Crawford County line.

Investigators said the driver, Jesse Sylvester, 28, had been traveling through the night and fell asleep at the wheel. She was not wearing a seatbelt and was ejected from the vehicle, deputies said. Sylvester was pronounced dead at the scene.

Deputies said two of the children were flown to Hurley Medical Facility in Flint. The other passengers were treated at Grayling Mercy Hospital.

Deputies said that lack of sleep and failure to wear safety belts contributed to the fatality and the injuries. Only the front passenger, who received minor injuries, was wearing a seatbelt.