LONDON, Ont. - Police in London, Ont., have upgraded the charges against a man arrested in connection with the death of a woman who was hit by a minivan on the Western University campus.

Eighteen-year-old Andrea Christidis died in hospital last Friday after she was hit while walking at the university two days earlier.

Police had originally charged 24-year-old Jared DeJong with dangerous driving causing bodily harm, impaired operation causing bodily harm and having in excess of 80 milligrams of alcohol per 100 millilitres of blood.

Following Christidis' death, DeJong is now charged with impaired driving causing death, criminal negligence causing death and operating a motor vehicle with over 80 milligrams of alcohol per 100 millilitres of blood.

Christidis' family has said they are "heartbroken and deeply saddened" by her death.

Witnesses to the collision who have not yet spoken to police are being asked to contact them.