The Herald understands the van rolled backwards down a driveway and the woman was killed after she attempted to stop it.
The van rolled down the driveway, across Donovan Ave, crashed into an SUV before coming to a stop near a fence on the other side of the road.
Liddell told the Herald yesterday they had contacted WorkSafe. He said this morning the company had no further information about what happened.
"We don't know what happened except for the fact the van moved back ... We're devastated - numb," Liddell said yesterday.
A spokeswoman for WorkSafe said they are making inquiries to establish what the next steps of their investigation might be.
Police are continuing to investigate what took place and the woman's death has been referred to a coroner, a police spokeswoman said today.
A spokeswoman said yesterday initial inquiries indicated no one was in the van at the time of the incident.
Yesterday, a Donovan Ave resident said she heard a loud bang when she was putting out the washing in the afternoon but thought nothing of it.
She said she felt upset when she realised what had happened.
Last week, a 5-month-old baby died in Northcote after her stroller rolled down a driveway before being struck by a van on Lake Rd.
She was Chloe Patricia Jie Labone, of Auckland.
The accident happened on Lake Rd when a runaway stroller rolled down a hill in front of a passing van.
Witnesses reported seeing the basket in the stroller came free in the collision and the tot flung around three car lengths forward.