Police expect to make more arrests after disrupting a multi-million-dollar cigarette-smuggling operation in Sydney, involving corrupt waterfront officials, officers say.

Officers from the Polaris Joint Waterfront Taskforce, which comprises the Australian Federal Police (AFP), NSW Police Force, Australian Border Force, and the Australian Crime Commission, charged 12 people following raids on properties in Sydney yesterday morning.

Police said they expected to charge another person today.

Those arrested were aged between 21 and 65, and have been charged with a range of offences, including smuggling and dealing with the proceeds of crime.

Police said the group helped smuggle large quantities of illegal cigarettes and tobacco into Australia, including a shipment of 9 million 'Manchester' branded cigarettes from the United Arab Emirates, which arrived at Port Botany this month.

The cigarettes had a black market value of about $5.4 million.

It is alleged employees attached to Customs brokerage companies and freight-forwarding firms were paid tens of thousands of dollars to create false declarations and shipping documents to enable the importation.

AFP Acting Deputy Commissioner Operations Ian McCartney said the shipments of illegal cigarettes and tobacco had been collected by a local syndicate and was bound for the black market in Sydney.

"The key aspect for us is the tax not being paid to the Commonwealth Government," he said.

Sorry, this video has expired Police arrest tobacco smugglers in Sydney

The syndicate had avoided more than $9.1 million in Customs duties.

The syndicate was also allegedly involved in the supply of commercial quantities of cocaine.

About 270 grams of cocaine was seized during the investigation, with a street value of about $184,000.

Detectives also seized more than $700,000 in cash during the investigation.

Deputy Commissioner McCartney said the AFP had been working with its partner agencies to restrain $2 million in assets, including personal and business bank accounts as well as houses owned by individuals charged with involvement in the syndicate.

Polaris Waterfront Task Force Commander Detective Superintendent Nick Bingham said the arrests were part of a long-term investigation into Sydney's waterfront.

"This operation has shut down a significant syndicate allegedly involved in facilitating the importation of illicit goods into the country and distributing those goods into the community, as well as trafficking in commercial amounts of prohibited drugs," Detective Superintendent Bingham said.

Deputy Commissioner McCartney said police expect to make further arrests.

"This is a sophisticated syndicate. Obviously with tentacles here plus overseas, so there's a lot of overseas inquiries ongoing in relation to this matter," he said.

Three men are due to face court today on drugs and smuggling charges. The rest of the alleged syndicate will face court next month.