Another attempt has been made to burn down the Suva office of the general secretary of the Fiji Post & Telecom Association, Attar Singh.
The incident happened shortly after 9pm on Saturday. No-one was injured and the flames were doused before there was any serious damage to the building.
Radio New Zealand's correspondent in Suva says a jug of petroleum and a farmer's hat were found at the scene.
Mr Singh also heads the Fiji Democracy group and Radio New Zealand's correspondent says this was the third attack against him.