Police and Northland lines companies are warning the public against touching or moving downed power lines.

The warning follows an incident this morning on Port Rd, Whangārei, where a member of the public was seen moving a live 400 volt line that was brought down by a truck.

"The line that was picked up and moved was a live 400 volt line and the member of the public could have been electrocuted and killed," Northpower and Top Energy spokesman Steve Macmillan said.

"When you receive a shock from a voltage like that there is an involuntary reaction from your body causing your muscles to contract and grip so hard you can't release."

The power line was brought down by a truck with a crane arm on the back. Nobody was injured.

Were you the man who picked up the cable, or do you know who he is? If so, call the Northern Advocate on 09 4702875 or email [email protected]