A woman who was hit by a flying wheel that dislodged off a dump truck in Mississauga, Ont., yesterday has died, Peel Regional Police confirmed Saturday.

Brampton, Ont., resident Diane Tsialtas was struck as she was walking on the sidewalk of Meadowvale Boulevard, just north of Highway 401, on Friday at around 8 a.m. ET.

The woman, 49, was airlifted to Sunnybrook Hospital in Toronto following the incident on Friday. Peel police said she died from her injuries. 

She was an employee at Mary Kay Cosmetics, which is located near where she was injured. The company declined an interview request but released the following statement:

"The Mary Kay family is devastated by the tragic loss of our dear friend and colleague. Diane Tsialtas was a wonderful, loving soul, and our hearts go out to her family at this difficult time."

The wheel, weighing nearly 200 pounds, was one of two that became dislodged off the truck. The wheels — two of 14 used on the truck — became loose, came off and went airborne. One of those wheels struck the woman. 

A truck technician told CBC News he believed the wheels were not properly secured on the dump truck because nuts that need to be tightened to keep the wheels in place and attached to the truck appeared loose in images he saw of the vehicle. 

Police said they had conversations with the driver of the 14-wheel dump truck, but no charges were laid. Police also said the investigation is ongoing.