Auckland police today arrested two people in connection with the country's biggest cocaine bust made in Tauranga last week.

In a combined operation police and customs seized 46kg of cocaine with an estimated street value of $20 million, and charged four men with importing the class A drug.

Organised crime group general manager Detective Superintendent Greg Williams says a 29-year-old Birkenhead male is charged with four counts of money laundering, and a 35-year-old woman from Auckland Central faces one charge of money laundering as part of the continuing operation. They are due to appear in the Auckland District Court on November 14th.

Today's arrests follow the arrests of four foreign nationals in Tauranga last week, says Greg.

A number of items have also been seized by Police following a search warrant in Birkenhead this morning.

These include a 2017 Honda Civic vehicle, a motorbike, various electronic equipment including phones and laptops as well several thousand dollars in cash and a money counting machine.

Today's arrests are the result of a dedicated five-month long investigation.

'The arrests followed an investigation which uncovered a sophisticated money laundering operation involving hundreds of thousands of dollars,” says Greg.

'Police will continue to hold those to account who are responsible for the laundering of funds generated by the drug dealing activities of criminals.

'This is a very serious offence and carries a maximum sentence of 7 years imprisonment.”

The investigation is continuing and police do not rule out further arrests.