11:00 p.m. Update:

Alaska State Troopers have identified the four people killed in a Parks Highway collision on Monday.

According to AST, 40-year old Cary Taylor-Bloomquist of Palmer was driving southbound on the Parks Highway with her 5-year old daughter Adeline "Addy" Bloomquist in the back seat of a 2018 Subaru Outback.

Cary Taylor-Bloomquist reportedly crossed the center line into the northbound lane, colliding with two motorcycles.

62-year old David Fulton of Fairbanks was on one of those motorcycles, and was medevaced to Providence Hospital in Anchorage with critical injuries.

63-year old Jeffrey Esley of Fairbanks was driving the other motorcycle with his wife, 60-year old Charlene Esley on the back. Both were killed in the collision.

David Fulton's wife, 50-year old Heidi Fulton, was driving a GMC Sierra PK truck northbound behind the two motorcycles when the collision occurred.

After the Subaru driven by Bloomquist collided with the motorcycles, the GMC truck driven by Fulton collided with the Subaru.

Cary Taylor-Bloomquist — the driver of the Subaru — was killed in the collision. Her daughter Adeline was critically injured and medevaced to Providence in Anchorage where she later died from her injuries.

Heidi Fulton, the driver of the GMC truck was not seriously injured according to AST, but two of her children in the truck with her, ages 10 and 13, were taken by ambulance to a hospital in Wasilla with what are believed to be non-life threatening injuries.

Family members have been notified.

Troopers are investigating the scene. Troopers are directing both north and southbound traffic through one open lane.

7:52 p.m. Update:

Four people have died in a Parks Highway collision, including a child who was medevaced to Providence Hospital in Anchorage.

Alaska State Troopers say a 63-year old man, a 60-year old woman, and a 40-year old woman died at the scene.

The child, whose age and gender have not been released, was declared deceased at Providence at 7:45 p.m.

Troopers have opened one lane of the highway, and traffic is being allowed to pass intermittently.

AST is working to notify family members.

The cause of the crash is under investigation.

Update:

One victim has been medevaced to Providence Alaska Medical Center in Anchorage with potentially life-threatening injuries, according to the AST dispatch center.

Original story:

Two people were confirmed dead and three others critically injured in a collision at mile 156.5 of the Parks Highway on Monday, according to Alaska State Troopers.

The collision, involving two motorcycles and a Suburau sedan, was reported to AST around 4:30 p.m. Monday.

The Parks Highway is completely blocked as of 5:15 p.m.

Troopers from Cantwell, Healy, and Wasilla are responding.

Two Life Flight helicopters are responding to the accident.

Troopers say the highway will be closed for several hours while they conduct an investigation into the crash.