Two nightclub promoters from Melbourne have been arrested in Bali following a series of raids by police investigating a major cocaine trafficking syndicate in the resort town of Canggu.

William Cabantog, 35, and David Van Iersel, 38 were arrested on Saturday by Balinese police, who are understood to have seized CCTV footage from a venue in Canggu, where one of the men worked as a promoter.

David Van Iersel (left) and William Cabantog.

Police are also believed to have found a set of scales during several raids over the weekend, but it remains unclear if the men were found in possession of any drugs.

A Balinese police source confirmed that two Australians had been arrested, but no charges had been laid and the investigation was ongoing.