Fire and Emergency (FENZ) services are on Dixon St in Wellington's CBD, where residents from a building have been evacuated.
A FENZ spokesperson told the Herald they were called to the scene after reports of a "apparent hazardous substance following an alarm activation".
![Fire fighters at the scene of the evacuation. Photo / Nick James](https://www.nzherald.co.nz/resizer/v2/FPLMMKQL4PF7ZGCEUBNFMCRZRY.jpg?auth=3b114ebd62bb165485829b2b2c048ca52caf8f2ccd2207f89b65ea677876bf1a&width=16&height=12&quality=70&smart=true)
Six trucks were sent to the scene, and one has since left.
The building is a mixed-used residential and commercial space, Newshub reports.