Vellore/Chennai:With September 9 fixed for hanging of the three death row convicts in the Rajiv Gandhi assassination case -- Murugan, Perarivalan and Santhan – the high-security prison at Vellore where they are lodged has come under a security blanket amidst a growing demand for their clemency.

READ MORE: Rajiv Gandhi killers to be hanged on September 9  

A three-tier security has been put in place in and around the prison with armed guards being posted as part of security.
  
While police have cordoned off the area restricting public movement, access control measures have been put in place for visitors to the prison.
  
Scores of pro-Tamil groups and leaders, including MDMK founder Vaiko had staged a fast and organised human chains among other forms of protest across the state even as Vellore prison authorities are gearing up for execution of the three persons, who are likely to move the court on Monday against the Presidential rejection of the clemency petitions.

Political leaders, including PMK founder Dr S Ramadoss and Vaiko have already demanded intervention of Chief Minister Jayalalithaa to whom the trio had sent a petition.
  
DMK president and former Chief Minister M Karunanidhi,whose party is a key constituent of the Congress-led UPA at the Centre, had demanded intervention of Congress President Sonia Gandhi in this matter.

It was at her behest that the death sentence of another convict, Nalini, was commuted to death sentence a few years back in the same case.
  
Meanwhile, TNCC President K V Thankgabalu slammed the protests demanding clemency, saying rules cannot be bent for individuals.

Established procedure must apply: Brinda

CPI (M) leader Brinda Karat on Saturday said "established legal procedure" must apply for all cases including that of the three death row convicts in the Rajiv Gandhi assassination case.
  
Talking to reporters here, she said the "country has a law and we go by it. The Supreme Court has said that death sentence is given in the rarest of the rare cases.

There were also avenues for appeal. We go by it"?, she asked.
  
"The legal procedure in the country is well established. We have to move according to the legal procedure", the CPI (M) polite bureau member said.

(Agencies)