Chennai, Sep 22 - S. Nalini and Robert Payas, in prison for the 1991 killing of former Indian prime minister Rajiv Gandhi, Tuesday continued their fast demanding their immediate release.

While Nalini began her protest at the Vellore jail Monday, Payas has been on hunger strike since Sep 17. Vellore is 130 km from Chennai.

Both Indians are undergoing life imprisonment for Gandhi's assassination and contend that they have spent more than 14 years in jail. Nalini's husband, Murugan, a Sri Lankan, is also in jail.

The superintendent of the women section in the prison, Vellore Jeyabharathi, told IANS over telephone: 'Nalini is still on fast. She said she will fast till her release.'

The official added that under prison rules no one can meet a fasting prisoner.

Both Nalini and Payas were first sentenced to death. Later their sentence was commuted to life imprisonment.

Last week, Nalini filed a petition in the Madras High Court asking the Tamil Nadu government to convene an advisory board to consider her case for release.

Nalini said that she had been entitled for release in 2005 because she had completed 14 years in prison.

In 2007, the Tamil Nadu government rejected her application for freedom.