The Rapid Action Battalion (RAB) has arrested five people on charges of spreading propaganda against the state and instigating vandalism.
The arrestees have been identified as Md Abdullah Al Mahmud, 29, Md Wayez Kuruni, 27, Md Towhidul Islam, 26, Md Gazi Sakhawat, 29, and Md Habibur Rahman, 30.
Laptops, portable hard disks, leaflets used to instigate vandalism and anti-state activities have been seized from their possession, officials said on Friday.
During primary interrogation, the arrestees told investigators that they used to send misinformation about Bangladeshi law enforcement agencies to many foreign media and "conspired against the state".
Mahmud and Towhid were wanted in several cases of vandalism and terrorism lodged at different police stations, the RAB said, adding that "legal action is underway against the arrestees".