The Delhi High Court convicted Congress leader Sajjan Kumar for conspiracy to commit murder in the 1984 anti-Sikh riots case and sentenced him to imprisonment for life.
A bench of Justices S. Muralidhar and Vinod Goel convicted Sajjan for criminal conspiracy, promoting enmity and acts against communal harmony.
The high court said Sajjan's life imprisonment will be for the remainder of his life and asked him to surrender by December 31.
The conviction of five others -- former Congress councillor Balwan Khokhar, retired naval officer Captain Bhagmal, Girdhari Lal, former MLAs Mahender Yadav and Kishan Khokhar-- were also upheld by the high court.
The high court was hearing the appeals filed by the CBI, riots victims and the convicts, challenging a trial court's judgement in the 1984 anti-Sikh riots case in which Sajjan was acquitted.
(with news agency inputs)