The government of Bangladesh has ordered an investigation into the deaths in custody of 21 border guards held after a mutiny earlier this year that left dozens of people dead.
Officials earlier said four of the 21 deaths were suicides, while the others resulted from heart attacks and other causes.
A government official said the committee carrying out the investigation will have 15 days to submit its report on the deaths.
The probe was ordered after the U.S.-based Human Rights Watch questioned whether the detained guards were subjected to torture.
A separate government committee investigating the mutiny submitted a report to Bangladesh's home ministry on Thursday. No details from that probe have been released.
More than 1,800 border guards have been detained for questioning following the two-day revolt in Dhaka in February.
A total of 74 people were killed, including 57 army officers who commanded the guards.