A baby, who was delivered by emergency C-section after a car crashed into a London, Ont. Costco and struck her pregnant mother, has died.

Seven-day-old Rhiannon Bozek was in critical condition at a London hospital but died on Friday, police have confirmed.

The infant's mother and two sisters were shopping at the big box store at around noon on July 25 when a car, in reverse, came crashing through the front doors of the building.

Both sisters and the mother were hospitalized after the crash and one of the sisters, six-year-old Addison Hall, died from her injuries two days later.

“It is heartbreaking," said London Police Const. Alanna Hollywood. 

"Mom remains in good condition in hospital and the three-year-old, Miah, remains in fair condition right now." 

Three others, including the female driver of the vehicle, were also hospitalized but have since been released.

Hollywood said police are continuing to investigate and charges have not been laid. Officers will be looking into various potential causes of the accident including medical issues, driver error and mechanical error.

"It was merely a case of being in the wrong place at the wrong time," Hollywood said.

"Drivers need to be aware of their surroundings at all times, whether they are in parking lots or on the road. Costco is a very busy parking lot especially, as you can imagine, on a Friday afternoon." 

Police are asking any witnesses to the crash to contact the London Police Service’s Traffic Management Unit at 519-661-5680.