Two Brazilian men are expected to be charged after one was caught allegedly trying to smuggle cocaine through Brisbane Airport in his underwear.

Australian Customs and Border Protection Service (ACBPS) officers selected the two men, aged 23 and 26, for a baggage examination, when they arrived on a flight from Auckland on Wednesday.

During the examination, officers said they noticed "an abnormal bulge located in the vicinity of the 26-year-old's groin".

A frisk search was conducted, which it is alleged, revealed concealed cocaine, an ACBPS statement said.

The second man was allegedly found to be carrying an amount of cocaine.

A total of five kilograms of the drug was recovered.

Acting Regional Commander Queensland John Ikin said Customs and Border Protection was committed to preventing illegal drugs from entering Australia.

"Our officers are specialists at detecting drug concealments. If people think they can smuggle illegal substances into Australia past Customs and Border Protection they are sorely mistaken," Mr Ikin said.

"Importers of illicit drugs can face a maximum penalty of life imprisonment. Smuggling drugs is simply not worth the risk."

The men were referred to the Australian Federal Police.