A Victoria University building was the target of graffiti in the weeks leading up to a suspicious fire that left it significantly damaged.
Police have revealed more information about the blaze that broke out at about 3am on Friday October 1.
Three minor explosions were heard coming from the Contemporary Chinese Research Centre on Kelburn Parade before the fire spread from the ground floor to the second.
The research centre is funded by Victoria University of Wellington.
Acting Detective Senior Sergeant Richard Orr said police were investigating and were seeking help from the public.