NSW house, cannabis plants go up in smoke

About 20 cannabis plants went up in smoke when a hydroponic set-up caught fire in a house on the NSW central coast.

The property, on Holly Avenue in Narara, caught fire about 5am on Tuesday and was well alight by the time firefighters arrived.

A hydroponic set-up was found in the upstairs main bedroom, where the fire is believed to have originated, when the house was inspected after the fire, and police have arrested a 56-year-old man.