Gunmen attacked a cafe in the country's capital a year ago.
The man was initially suspected of a suicide attack but police said the bomb exploded while he was hiding it from police.
The gunmen shot 66-year-old Kunio Hoshi dead on a dirt road in 2015.
Two senior U.N. officials told Reuters the crisis is significantly worse than previously thought.
Officers raid property in Bangladeshi capital after attack that left 18 foreign hostages dead.
The Myanmar army initiated a crackdown on purported Rohingya militants in October.
Bangladeshi police also arrested a University of Toronto student.
The militants were members of the ISIS-linked Jamaat-ul-Mujahideen Bangladesh, police said.
Authorities believe online posts are radicalizing young people, leading to deadly attacks.
The messaging of the extremists behind the recent attack in Dhaka has roots in the country's colonial past.
Home minister says the deadly attack can be attributed to homegrown militants who are behind a spate of murders.
Three of the victims in the attack at a cafe were students at Emory, Berkeley universities.
Civilians, police and gunmen dead after rampage in Dhaka cafe.
Islamic militants killed 20 people inside a cafe popular with foreigners.
Authorities are attempting to stop a series of attacks on minority groups in the country.
ISIS and Al-Qaeda have claimed responsibility for murders in Bangladesh, but the government blames homegrown militants.
India would be reasonably happy if Pakistan and Bangladesh were to merge again but the possibility of any such merger is remote given all the past horrors.
A court found him guilty of genocide, rape and torture during the 1971 independence war.
Jihadi group says pair were killed for “practicing and promoting homosexuality.”
Xulhaz Mannan, who was openly gay in a country where being so is not widely accepted, was the editor of "Roopbaan."