Hato Hone St John said they responded with two ambulances and two rapid response vehicles.
One person was taken to Christchurch Hospital in a critical condition.
Emergency services respond. Photo / Jazlyn Whales
About 11.30am, the person was safely removed from a ledge above one of the main entrances by firefighters and moved into an ambulance.
A man working nearby heard a loud scream before someone fell from a top balcony onto a ledge.
They said they saw a person falling and landing heavily.
He lost sight of the person before taking a step back.
“I saw their arms, legs, and head moving, so after .”
Christchurch City Libraries said “due to an unforeseen incident” Tūranga will be closed for the rest of the day.
“We apologise for the inconvenience.”