A Delhi court today rejected the anticipatory bail plea of Congress leader Sajjan Kumar in the cases relating to 1984 anti-Sikh riots after the prosecution contended that witnesses are apprehensive.<br/>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 that followed the assassination of the then Prime Minister Indira Gandhi. 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 vehemently opposed the bail application on the ground that witnesses are apprehensive. The CBI prosecutor also argued that the provision of anticipatory bail should not be invoked in grave offences like murder. Arguing for bail, Kumar's counsel I U Khan said the cases against the Congress leader were politically motivated and malicious in intent.