Anti-Terrorism Unit (ATU) of Police on May 9 arrested an IT operative of Hizb ut-Tahrir in South Keraniganj area of Dhaka city in Dhaka Division, reports The Daily Star. The arrestee was identified as Riaz Uddin Sipai. He has been coordinating operations in Jagannath University, South Keraniganj, Shyampur, Dania and Gendaria areas for the last three years, Police told.