Bangladeshi authorities have charged seven individuals, including an opposition politician, over the murder of an Italian aid worker.
50, Cesare Tavella, was shot dead in late September, in the capital, Dhaka.
The assault on Mr Tavella was the first in killing in Bangladesh maintained by Islamic State militants.
Islamist violence has soared lately, although attacks on foreigners in Bangladesh are uncommon, correspondents say.
About 40 individuals, including spiritual minority members and lay bloggers, happen to be killed in strikes in previous years.