Detectives arrested four youths, including a Dhaka University student, in the capital yesterday for attempting to murder blogger Asif Mohiuddin.
They are Saad-al-Nahin, 24, an evening shift MBA student of Dhaka University; Kawsar Ahmed, 26, a hawker in Mirpur; Kamal Uddin, 23,  a carpenter from Noakhali, and Kamal Hossain, 28, a security guard of Mutual Trust Bank, hailing from Barisal.
All four are members of a newly formed militant organisation Ansarullah Bengali Team that follows Yemen-based Al Qaeda leader Anwar Al-Awlaki, said Detective Branch of police.
DB earlier arrested another five of the same organisation for killing blogger Ahmed Rajib Haider on February 15 at Mirpur in Dhaka.
Rajib was an activist of the Shahbagh demonstration that has been calling for death penalty to all war criminals and a ban on Jamaat-Shibir.
The four arrestees had been involved in the attempt to kill Asif at Uttara on Jaunuary 13, said Mashiur Rahman, additional deputy commissioner (west) of DB.
DB police arrested Nahin at DU campus, Kawsar and Kamal Uddin at Mirpur and Kamal Hossain at Jatrabari with several books on Jihad, martial arts clothing and fake BBA certificates.
Abdul Karim, an Arabic student of Dhaka University, and Rana masterminded the killing of Rajib and the attack on Asif, said Nazrul Islam Mollah, deputy commissioner of DB.
A group of 14 to 15 people were supposed to kill Asif but of them, only two -- Nahin and Nobin Hossain, who is on the run, swooped on Asif, he added.