A SOUTH Korean-born Sydney man has been charged with acting as an economic agent for North Korea in Australia by allegedly attempting to broker sales for Pyongyang that included components used in ballistic missiles.

The Australian Federal Police (AFP) said 59-year-old naturalised Australian Chan Han Choi used encrypted communication to broker sales and discuss the supply of weapons of mass destruction worth tens of millions of dollars.

His actions contravened both United Nations and Australian sanctions against North Korea, police said.

Police said the man was acting to generate income for Pyongyang by arranging the sale of computer software used for guiding ballistic missiles as well as expertise from North Korea to other “international entities”.

Australia’s Prime Minister Malcolm Turnbull said he had been briefed by AFP commissioner Andrew Colvin on the “very, very serious matter” and warned anyone thinking of assisting North Korea that “the AFP will find you”.

Despite international sanctions, cash-strapped North Korea last month test-fired its most powerful missile that may be able to target the US mainland.

Choi is facing six charges related to brokering the sale of missile componentry and expertise from North Korea to other international entities, and attempting to transfer coal from North Korea to entities in Indonesia and Vietnam.

Choi did not appear or apply for bail in a Sydney court today, and bail was formally refused.

Federal police assistant commissioner Neil Gaughan said the governments of Indonesia and Vietnam – or authorities in those countries – were not involved in the coal transfer attempt.

Choi is the first person charged under Australia’s Weapons of Mass Destruction Act and could face a maximum 10-year prison sentence.

Gaughan said the charges related to his alleged activity over the past year, but that allegations dated back to 2008.

Police had started investigating Choi after a tip-off from another international agency on another matter.