Two ambulances were sent to the Willis St warehouse where the 45-year-old woman was injured about 9.45am yesterday.
An upturned steel trolley was visible within the warehouse following the incident.
A police spokeswoman said the injured woman suffered moderate back and head injuries.
"There were reports that something has fallen on someone in a commercial premises," the spokeswoman said.
Police did not attend, but were advised by St John.A St John spokesman said the woman was taken to Dunedin Hospital’s emergency department in a moderate condition.
Two ambulances went sent to treat the woman and arrived at 9.55am.
A WorkSafe spokeswoman said the health and safety watchdog had been notified of the incident was making "initial inquiries".
"We have no further information at this stage," she said.
