Police in western Bay of Plenty are seeking help from the public to find the occupants of a car who threw a partially full bottle of beer at a Tauranga grandmother.
Mary Loader, 65, has what are described as horrific injuries. She is in an induced coma at Tauranga hospital.
Detective Senior Sergeant Greg Turner says the long-term physical and mental effects will be huge.
The attack happened along Domain road in Papamoa at about 8.15am on Sunday.
He says they have few details about the car and are relying on the public's help in finding those involved.
Anyone who wants to give information anonymously can call 0800 SPEAK UP.