Kannan, Anoop and Eswaran, who were arrested a month ago from Karumathapatti along with front-ranking leaders Roopesh and his wife Shyna, had moved bail applications in the Principal and District Sessions Court here.
Hearing arguments from both prosecution and defense, Judge Pongiyappan rejected the petitions.
Meanwhile, Shyna, who is lodged in a jail in Kerala, also moved a bail petition in the court, which would come for hearing on June 22.