Two brothers of Kings Cross nightclub figure John Ibrahim will face a Sydney court over their alleged role in an international drug-smuggling conspiracy.
Michael and Fadi Ibrahim, who were arrested in Dubai about six weeks ago, arrived in Sydney on Sunday night after being extradited.
Also returning to Sydney under police escort were underworld figures Mustapha Dib, 34, and Koder Jomaa, 47, arrested alongside the Ibrahim brothers on August 8 in a series of dramatic raids in Sydney and Dubai that resulted in 18 people being charged.
The Ibrahims will appear in Sydney's Central Local Court on Monday.
The AFP said four men were extradited and would face charges including conspiracy to import a commercial quantity of a border controlled drug, dealing in the proceeds of crime and possession of imported tobacco.
They could face up to 25 years in prison.
Police say they thwarted the syndicate's plans to smuggle two tonnes of illicit drugs into Australia.
The haul, which included 1.8 tonnes of MDMA and was estimated to be worth $810 million, was seized by authorities in the Netherlands in July.
AFP Assistant Commissioner Neil Gaughan said the extraditions demonstrated the reach of Australian law authorities around the world.
Those arrested also include John Ibrahim's son Daniel and his model girlfriend Sarah Budge.
There are no allegations involving John Ibrahim, although police did search his Dover Heights home.