Wairoa Fire Brigade chief fire officer Grant Duley said they received a call about 12.50am during the latest incident on Black St.
He said the fire was “fully involved” on arrival and it took firefighters about an hour to extinguish.
He said it was a single-storey, family home and “everyone got out of the house and is okay”.
“There is about 90 per cent damage inside, it is still standing but it is pretty well gutted,” he said.
“We are just waiting for police detectives and our fire investigator who are going to investigate [the circumstances].”
He said it was “very unusual to have that many house fires so close together” with two house fires in a week.
A police spokeswoman said the fire was being treated as suspicious, and a scene guard had been in place on Monday.
She said specialist fire investigators and CIB detectives were investigating.
“The earlier appeal for information on the Apatu St house fire on 25 January still stands. It is unknown at this stage if it is directly linked to the Black St fire.
“Police have some positive lines of inquiry into both fires, and the investigations continue.”
Call police on 105 and quote the relevant event number if you have information that could help the investigation.
For the Black St fire quote P053472893 and for the Apatu St fire quote P053416272.
