In this first trial Aung San Suu Kyi is charged with owning unlicensed walkie-talkies and violating Covid restrictions.

Later trials will focus on allegations of corruption and breaking the official secrets act.

Human rights groups have condemned the trial, describing it as an attempt to stop her running in future elections.

Ms Suu Kyi, 75, has been held under house arrest since the 1 February coup in Myanmar (also called Burma), and little has been seen or heard of her apart from her brief court appearances.

On Monday, Ms Suu Kyi's lawyers, who have met her only twice since she was detained, where to cross-examine witnesses over the claims.

Another trial will begin on 15 June over sedition charges.

If convicted of that charge alone, she faces up to 14 years in prison.

Last week, she was handed additional corruption charges over allegations that she illegally accepted $600,000 (£425,000) in cash and around 11 kilos of gold.

"There is an undeniable political background to keep her out of the scene of the country and to smear her prestige," her lawyer Khin Maung Zaw told AFP last week.

"That's one of the reasons to charge her - to keep her out of the scene."

The charges against Aung San Suu Kyi

* Corruption, with carries a maximum jail term of 15 years

* Violating the official secrets act, which carries a maximum jail term of 14 years

* Violating import-export laws by illegally importing walkie-talkies, which carries a maximum jail term of three years

* Violating the telecommunications law by importing walkie-talkies, which carries a maximum jail term of 1 year

* Two charges of violating a natural disaster law, carrying a maximum jail term of three years each

* Inciting public unrest, which carries a maximum jail term of three years

The military has justified seizing power in February, alleging voter fraud in general elections held last year.

But independent election monitors say the election was largely free and fair, and the charges against Ms Suu Kyi have been widely criticised as politically motivated.

The coup triggered widespread demonstrations, and Myanmar's military has brutally cracked down on pro-democracy protesters, activists and journalists.

On Monday, a US journalist detained in Myanmar since March was released after charges against him were dropped. Nathan Maung is due to fly out of Myanmar on Tuesday, according to his lawyers.

Security forces have killed more than 800 people and detained nearly 5,000 to date, according to the monitoring group Assistance Association for Political Prisoners (AAPP).