Members of Rapid Action Battalion (Rab) arrested eight members of two teenage groups from Uttara in the city on Wednesday morning in the schoolboy Adnan murder case. The arrestees are the member of ‘Disco Boys Group’ and ‘Big Boss Gang’, said sources at the Rab headquarters. The details of the arrest are still awaited. Adnan, a student of Uttara’s TrustSchool and College and a member of local Nine Star Group, came under attack in Uttara on January 6 allegedly by members of Disco Boys Group. Critically injured Adnan was rushed to a local hospital where doctors declared him dead.