Burma has hinted it wants opposition leader Aung San Suu Kyi's "case" resolved by October.
Aung San Suu Kyi has been detained since 30 May
Indonesia's foreign minister Hasan Wirayuda said he had been assured by Burma that the Nobel laureate's detention would be addressed before a meeting of the Association of South East Asian Nations on 7 October.
Mr Wirayuda did not explicitly say that Burma had promised to free Aung San Suu Kyi. But his comments are likely to raise hopes inside Asean and the international community that she could be released soon.
Since her detention on 30 May, following a clash between her supporters and pro-government groups, pressure has been building on Burma's military junta to release her and restart talks on reconciliation.
Asean has already criticised Burma - one of its 10 member states - for detaining her, while several member countries want more decisive action.
Earlier this week the United States imposed fresh economic sanctions on the country - a move Burma's Foreign Minister Win Aung described as "without any regard for the people".
On Wednesday, campaign group Amnesty International also criticised Aung San Suu Kyi's continued detention.
Win Aung called the US sanctions on Burma a "one-sided action"
In a hard-hitting report on human rights in Burma, entitled "Justice on Trial", the group called for a full and impartial investigation into the events of 30 May.
Amnesty's 60-page document is a result of an unprecedented trip to Burma in February to investigate the country's judicial system.
The report said reform was urgently needed, and called for an end to the arbitrary arrest and torture of political prisoners, thousands of whom it says are currently being held in Burma.
One of the report's authors, Amnesty researcher Donna Guest, said that since Aung San Suu Kyi's detention, the human rights situation in Burma had deteriorated.
More than 100 people are believed to have been detained on political grounds in the last two months, Ms Guest told BBC News Online.
The only good news, she added, was that officials from the International Committee of the Red Cross (ICRC) had met Aung San Suu Kyi on Monday and said she was in good health.
According to Amnesty, the attack which led to the pro-democracy leader's arrest was probably premeditated, although Ms Guest added that it was "almost impossible to know exactly what happened".
The government says Aung San Suu Kyi's supporters provoked a fight, but opposition supporters say she was taken in an ambush by government-sponsored thugs.