Thieves in Wanganui are risking death by cutting copper wire from live electricity networks.
Powerco's network in Wanganui was the target of a spate of copper thefts on Thursday night.
The thieves had cut copper out of the live electricity network with the likely intention of selling it for scrap, Powerco Network operations manager Phil Marsh said.
He said about 80 customers could have experienced interruptions to their power supply, but more worrying was that network safety had been compromised.
"These thieves are putting themselves at risk as well as the people of Wanganui by cutting out copper components designed to ensure the network is safe."