Emergency services are at the scene of a gas leak in Māngere Bridge.
A northern fire communications spokeswoman confirmed an incident had occurred at the site, on McKenzie Rd, just before 10.30am.
"Someone has drilled through a gas line. We have two fire appliances there and one hazmat crew at the scene," she said.
Two dozen apartment units have been evacuated as a result, she said, and police have blocked off McKenzie Rd between Badar Drive and Valient St.