The Islamists, who carried out Bangladesh's terror worst attack at a cafe in Dhaka, had slaughtered all the 20 hostages within 20 minutes of the brazen assault, a top police official said.
"The five terrorists killed at Gulshan (cafe) were JMB members. The police had their details and been looking for them for a while," Inspector General of Police AKM Shahidul Haque told media persons.
Inspector General of Police AKM Shahidul Haque, however, did not disclose the identities of either of the detainees or where they were being kept.
Bangladesh on Tuesday pressed anti-terrorism charges against several suspects and identified the fifth assailant in the country's worst terror attack as authorities intensified efforts to unravel the plot behind the brazen assault in which 22 people were slaughtered by Islamists.
