Spontaneous combustion is being blamed for a fire at a Mt Maunganui house yesterday.
Seamus and Anne McKenna got home to find four fire crews tackling a blaze that gutted a spare bedroom and scorched their newly-decorated kitchen.
Mt Maunganui fire station officer Lindsay Nicol said it appeared dust in a sander left in the bedroom self-ignited about 2pm.
Mr McKenna, 37, said he and his wife were "completely stunned".
"The fire guys told us it was spontaneous combustion," said the self-employed builder.