Dhaka, Nov. 12 -- Police have taken five people into custody over the killing of "top criminal" Tarik Saif Mamun in Old Dhaka, allowing investigators to interrogate them under the arms law.

On Wednesday evening, Dhaka Metropolitan Magistrate Partha Bhadra approved four days of police questioning, according to Sub-inspector Mizanur Rahman of the prosecution.

The suspects are Md Faruk Hossain Faisal alias Kutta Faruk, 38; Robin Ahmed alias Pias, 25; Md Rubel, 34; Shamim Ahmed, 22; and Md Yusuf alias Jibon, 42.

Police said Faruk and Robin "directly participated" in the killing and fired the shots.

Faruk, Robin, Shamim, and Rubel were arrested in Narsingdi on Tuesday night, while Yusuf was taken from Rayer Bazar in Dhaka.

Inspector Md Sa...