Detectives have detained two members of banned Islamist outfit Hizb-ut Tahrir at Uttara in Dhaka.
The detainees are Al Tamas Ahmed Babu and Syed Jane Alam Rubel.
Sheikh Nazmul Alam, deputy commissioner of Dhaka Metropolitan Police (DMP), said the duo were held during a drive on Sunday night.
He said another Hizb-ut Tahrir member fled the scene during the drive. "We are trying to catch him."
Police also seized jihadi leaflets and magazines from the possession of the detainees.