Reports of explosions and fireballs on a south Auckland rail overbridge have stopped trains and closed the overbridge.
The explosions were reported just before 8am on Wednesday at the Weymouth Road overbridge in Manurewa and were continuing an hour later, Fire Service northern communications spokesman Jaron Philips told NZ Newswire.
The explosions were believed to have caused by a power cable on the overbridge, he said.
"There were reports of flames showing and one report of a fireball."
The overbridge was closed and trains had been suspended.
There were no reports of injuries and no buildings caught fire in the incident.
Train services between Papakura and Puhunui were suspended, but Auckland Transport now says they are back to normal. Trains could however be running up to 20 minutes late.
Nearly 2000 customers lost power when the cable faulted.
3 News