The Commission of Inquiry into Enforced Disappearances is probing abuses during the rule of Hasina, whose government was accused of widespread human rights abuses.

That includes the extrajudicial killing of hundreds of political opponents and the unlawful abduction and disappearance of hundreds more.

The commission was established by interim leader, Nobel Peace Prize winner Muhammad Yunus, 84, who is facing intense political pressure as parties jostle for power ahead of elections expected early next year.

Bangladesh has a long history of military coups and the army retains a powerful role.

"Enforced disappearances in Bangladesh were not isolated acts of wrongdoing, but the result of a politicised institutional machinery that condoned, normalised, and often rewarded such crimes," the commission said, in a section of a report released by the interim government on Monday.

"Alarmingly, this culture of impunity continues even after the regime change on August 5, 2024".

The commission has verified more than 250 cases of enforced disappearances spanning the 15 years that Hasina's Awami League was in power.

Commission chief Moyeenul Islam Chowdhury said earlier this month that responsibility lay with individual officers, who were "involved in conducting enforced disappearances", but not the armed forces as an institution.

Earlier this month, a joint statement by rights groups -- including Amnesty International and Human Rights Watch -- called on the security forces to "fully cooperate with the commission by guaranteeing unfettered and ongoing access to all detention centres... and providing free access to records regarding those seized or detained".

Hasina,77, remains in self-imposed exile in India, where she fled after she was ousted last year.

She has defied orders to return to Dhaka to face charges amounting to crimes against humanity. Her trial in absentia continues.