The lawyer of an Australian-Lebanese dual citizen on trial for an alleged plot to bring down a passenger plane says her client has been ordered released on bail by a Lebanese military court.

Joceline Adib al-Rai, lawyer of Amer Khayyat, said Saturday the court's decision was delivered a day earlier. Prosecutors can appeal.

Khayyat has rejected the charges.

Lebanese authorities have held Khayyat in detention since 2017. They have accused him of planning to blow up an Emirati airline flight that was supposed to travel from Sydney to the United Arab Emirates.

Two of Khayyat's brothers are on trial in Australia for plotting to blow up the plane with bombs hidden inside a Barbie doll and meat grinder. Australian authorities say Amer Khayyat had no knowledge of his brothers' plot.