A verdict in the trial of Myanmar opposition leader Aung San Suu Kyi will come on Friday, a court official said, after her lawyers wrapped up their final arguments in the widely condemned case against her on security charges.

The official, who requested anonymity, told Reuters that her trial had been completed, although cases against three other defendants are continuing.

Journalists have been banned from attending the trial, but a handful of foreign diplomats have been invited occasionally as observers.

A guilty verdict is widely expected in the former Burma, where the courts have in the past been known to favour the ruling military junta. It was not clear if any sentence would come on Friday.

"We have done our best and she is prepared for the worst," Ms Suu Kyi's lawyer, Nyan Win, told reporters. "We don't want to speculate, but we will keep exploring all legal avenues."

Ms Suu Kyi, 64, is on trial for allowing American intruder John Yettaw to stay at her Yangon home in May, when she was under house arrest. He had evaded security to swim across the Inya lake to the house.

She faces five years in prison if convicted.

Ms Suu Kyi was awarded the title of "Ambassador of Conscience" by rights group Amnesty International on Monday for being a "symbol of hope, courage and the undying defence of human rights" around the world.