The late blogger, Nazimuddin Samad, a postgraduate law student from the state-run Jagannath University, was assaulted by four assailants while returning home with another youth after completing classes at his university.
In February, Roy, a Bangladesh-born American blogger, was killed with machetes and knives as he walked back from a book fair in Dhaka.
A month later, Washiqur Rahman, 27, was savaged by two men with knives and meat cleavers just outside his house as he headed to work at a travel agency in the capital.
Das, 32, was set upon with cleavers and machetes in May as he left his home on his way to work at a bank in northeastern Bangladesh.
Neel was hacked to death in his Dhaka apartment.
Niladri Chatterjee Niloy
Ananta Bijoy Das