Nalini Sriharan, one of the six convicts in former Prime Minister Rajiv Gandhi's assassination who were released a day ago following a Supreme Court order, on Sunday said she had no role in the plot and was jailed because of her acquaintance with her husband's friends. Asked if she regretted her role in the killing and that of others in the bombing, she maintained her innocence. "Seven times they put up black warrant (order for execution) they used to wait for me," she said.