Four people are fighting for their lives after being struck by a vehicle while attending to a crash involving a vehicle and a deer in northern Minnesota. 

The incident unfolded around 5:10 p.m. Monday just northwest of Duluth in St. Louis County, with the State Patrol reporting that a Buick was northbound on Hwy. 53 and struck a deer before stopping on the right side of the road near Caribou Lake Road. 

The crash report says the driver of a Dodge Ram then struck the Buick, which was partially on the shoulder and in the right lane. Two pedestrians were then checking on the occupants of the Buick when another northbound vehicle, a Ford SUV, hit the Buick, "causing one of the vehicles to strike the pedestrians." 

It's unclear if the occupants of the Buick were inside the car or outside of it when they were struck, but the crash report says four pedestrians were injured, indicating that they were out of the vehicle at the time of the crash. 

All four pedestrians suffered life-threatening injuries. They have been identified as Minnesotans: 

• Anna Marie Buchanan, 53, of Duluth
• Donald Gerald Buchanan, 21, of Duluth
• Nancy Elizabeth Johnson, 85, of Aurora
• William Bruce Johnson, 91, of Aurora

The Buchanans were transported to St. Luke's Hospital in Duluth and the Johnsons were taken Essential Health in Duluth. 

The drivers of the vehicles that struck the Buick were not injured. 

No further information has been released.