The cause of the Roxburgh town hall fire cannot be determined, Fire and Emergency investigators say.
A blaze gutted the building that was home to a 128-year-old cinema on February 6, Waitangi Day.
Risk reductions adviser John Smalls said the cause cannot be identified due to the extensive damage to the building.
"We're really thankful to the community for the fantastic response we got when we asked for information, images and footage of the fire.
"These contributions helped us confirm that the fire is highly unlikely to have had a suspicious cause."
The building was erected in 1893 and had started showing films in 1897.
It had previously been part of a Guinness World Records claim of possibly being "longest continuously running movie theatre in the world".
The fire came only a month after the building avoided major damage during a blaze in January this year.
