Special CBI judge P S Teji refused to grant any relief to the former MP who has been issued summons for his alleged role in the carnage.
The court also dismissed similar pleas of six co-accused in the cases.
It allowed the contention of CBI Special Prosecutor Y K Saxena who opposed the bail application on the ground that witnesses were apprehensive.
The CBI prosecutor also argued that the provision of anticipatory bail should not be invoked in grave offences like murder.
Sajjan Kumar's counsel I U Khan said the cases against the Congress leader were politically motivated and malicious in intent.