Emergency services were called to Orchard Rd shortlybefore 6.50am, but she died a short time later.
Police have asked the public for help in locating two of Bella's missing items, which may have been discarded in Christchurch on December 31, the day she died.
"They are a small light brown, shimmery bag, about 10cm x 20cm with a strap, and a black Huawei cellphone with a cracked screen," a police spokesperson said.
Anyone who has seen or found items matching those descriptions in the Christchurch area from early Tuesday morning onwards, should call police on 105, quoting file number 191231/9680.
A 42-year-old man who was at the scene of Te Pania's death has since been charged with murder.