Wellington commuters travelling by train have been hit by delays this morning.
Metlink is warning commuters to expect delays across the network after a worker accidentally knocked a fire sprinkler.
That caused the Wellington train station to be evacuated just after 7am and brought all services to a halt.
Meanwhile, the 6.47am service from Masterton to Wellington is being held outside Maymorn after a truck hit a bridge.
And the 6.20am service on the same line had to be held at Waterloo station for approximately 23 minutes because of a medical emergency.
The central train station has reopened.