AFP worked with Cambodia on drugs arrest

Soumy Phan and Julian Drape

The AFP is working with Cambodian authorities who have arrested an Australian woman at Phnom Penh International Airport for allegedly trying to smuggle almost two kilograms of heroin in her luggage.

Cambodia's immigration department said on its official Facebook page that 1814 grams of heroin were found embedded in the side of Ve Thi Tran's suitcase in several different packages.

An immigration official at Phnom Penh airport, who declined to be named as he was not authorised to comment, said the 37-year-old was preparing to return to Australia via Hong Kong when she was arrested while checking in at the airport on Saturday.

The arrest followed a tip-off from the Australian Federal Police, which requested co-operation with Cambodia's immigration department in making the arrest, the official told AAP.

"The AFP can confirm it is working with Cambodian authorities on this matter," a spokesman told AAP in a statement.

"While enquiries continue no further comment will be made."

Tran is being questioned by Cambodia's anti-transnational crimes squad.

Australia's Department of Foreign Affairs and Trade says it's aware an Australian woman has been detained in Phnom Penh.

"We stand ready to offer consular assistance in accordance with the consular services charter," a spokeswoman said in a statement.