Manslaughter charge after ambulance crash

A woman has been charged with manslaughter after she allegedly drove through a red light and was on the wrong side of the road when she crashed into an ambulance in Perth, inflicting fatal injuries to an elderly patient.

The crash in Dianella last week caused the ambulance to roll on its side and an 87-year-old woman who was inside died in hospital three days later.

A 24-year-old female passenger in the driver's small car also suffered serious injuries.

The 30-year-old woman was initially charged with two counts of dangerous driving occasioning grievous bodily harm but one of those counts was upgraded to manslaughter on Tuesday.

She has also been charged with no authority to drive and is due to appear in the Perth Magistrates Court on Wednesday.