A special tribunal in Bangladesh on Monday told investigators they have one month to complete their work on ousted former Prime Minister Sheikh Hasina and her close aides who face charges of crimes against humanity after hundreds of people were killed in a mass uprising this summer.

Golam Mortuza Majumdar, the head judge of the three-member International Crimes Tribunal, set Dec 17 for investigators to finish their work, as the tribunal heard updates Monday from police about what the country's security agencies have done to arrest Hasina and her close aides.

The decision came after prosecutors sought more time for the investigation.

Hasina has been living in exile in India since Aug 5 when she fled the country amid the student-led protests. The Dhaka-based International Crimes Tribunal on Oct. 17 issued arrest warrants for Hasina and 45 others including former Cabinet ministers, advisors and military and civil officials. The country is now being run by an interim government headed by Nobel Peace laureate Muhammad Yunus.

At least 13 people, including a former law minister and a businessman who was Hasina's private-sector advisor, appeared before the tribunal on Monday, said B M Sultan Mahmud, a prosecutor at the tribunal.

One former Cabinet minister was not brought to the tribunal as he was in custody for police interrogation in a separate case. Another six people will appear on Wednesday, tribunal officials said. At least 20 suspects have been arrested in the case.

The tribunal will also seek updates from police on their progress in arresting the other suspects, including Hasina.

The chief prosecutor of the tribunal has already sought help from Interpol through the country's police chief to arrest Hasina. On Sunday, Yunus said in an address to the nation that his administration would seek Hasina's extradition from India.

Authorities say hundreds of people were killed during the uprising in July and August mainly by security agents seeking to quell the initial protests over government jobs. The violence intensified as the protests morphed into an anti-government movement with more bloodshed, ending Hasina's 15-year rule. Hasina had also earlier sought an investigation into the killings.