UNICOI COUNTY, Tenn. -

UPDATE 1:08 p.m.: THP is releasing more information about this morning's accident involving pedestrians at a bus stop.

The Unicoi County Sheriff's Office and THP responded to the call that was placed at 6:30 Thursday morning.

They say the school bus had the 'Stop' arm out with red lights flashing. That's when a 6-year-old boy and his grandmother were trying to cross the road to get onto the school bus.

Troopers tell us that's when a 2011 Kia Sorento hit both of them. They tell us the 6-year-old boy was loaded into ambulance, then officers noticed the grandmother had also been injured.

Authorities say the child had broken femur, a base skull fracture, and has a blood clot between the skull and the brain. The grandmother had a chipped femur and broken ribs.

The driver told troopers she didn't see red lights on the bus, only the yellow lights.

The driver, 57-year-old Kris Ann Waterhouse, is being charged with two counts of reckless aggravated assault and one count of passing a school bus.

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UPDATE 12:00 p.m.: We've learned the driver of the vehicle that hit the pedestrians, a female whose name has not been released yet, has been arrested. She is currently at the Unicoi County jail.

We'll bring you more information as it's available.

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UPDATE 7:48 a.m.:  Two people were taken to the hospital this morning by ambulance after they were hit by a car while waiting on a school bus.

Unicoi County Sheriff Mike Hensley says it is not clear if the victims had started to cross the road to the bus when they were hit.

He describes them as a grandmother and small child.

Hensley tells us the Tennessee Highway Patrol is now leading the investigation. The sheriff's department is caring for three other children in the family at the home while their mother returns from out-of-town.

There is no word on the condition of the victims.

The school bus was not directly involved in the crash.

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Unicoi County Sheriff Mike Hensley tells News 5 they are responding to an accident at a bus stop.

Sheriff Hensley says two people were hit by a car just before 7 o’clock this morning while they were waiting for the bus.

It’s believed the victims are a parent and child.

We do not know the extent of their injuries or what happened.

The accident happened along Unicoi Drive just passed Buffalo Valley Golf Course near the old Budget Inn.

We’ll continue to follow this story and we’ll bring you the facts as we get them throughout the day on-air and online.