One of three people who were seriously injured in a two-car collision near Hawkesbury Friday night has died.

Ontario provincial police say 40-year-old Isabelle Robitaille was transported to the Civic campus of the Ottawa hospital where she died over the weekend.

Her 15-year-old son Christopher Soulliere remains in critical condition at the Children's Hospital of Eastern Ontario.

Thirty-six-year-old Guy Laberge, who was driving the second vehicle involved in the crash, is in stable condition at the Hawkesbury General Hospital.

Police are continuing their investigation.