The accused were arrested yesterday and have been identified as Deshpal, Chatra, Buresh, Jitender, Guddu and Shoki, police said, adding they had been absconding since last year.
They were produced in court here and sent to judicial custody till December 25, police added.
On December 8, one person was arrested in connection with the case.
Eight persons, including a woman were killed and 20 others injured during riots in Kutba on September 8 last year.
Police had registered cases against 110 rioters.
According to the Special Investigation Team (SIT), which was set up to probe the riots, more than 50 people were allegedly involved.