Hundreds of protesters have gathered outside Parliament House in Canberra to call for an end to the coup in Myanmar.
The protesters want the restoration of the elected government of Aung San Suu Kyi, which was ousted by the military on February 1.
They are also concerned they have been unable to contact family and friends due to a media and internet blackout they say violates human rights.
Australian economics adviser Sean Turnell was among those detained since the military seized power.
Foreign Minister Marise Payne confirmed on Friday Australia's ambassador had spoken with Professor Turnell to discuss his health, welfare and conditions in which he is being detained.
Work was continuing to secure his release, Senator Payne said.
Prof Turnell's wife Ha Vus said he had made a positive contribution to Myanmar.
"He worked for Myanmar by using his knowledge of economic from 20 years. He is someone who brings job opportunities and jobs to Myanmar people."
