Making a guarded response to AIADMK's decision to remit the sentence of life imprisonment of seven convicts in Rajiv Gandhi assassination case, BJP's Tamil Nadu unit on Thursday said a "humane approach" should be taken on their incarceration period, but it should be within the legal framework.

Party's State unit President Tamilisai Sounderrajan also charged the government with not taking a "firm decision" when there was time earlier.

Speaking to reporters in Chennai, she underlined her party's stand that not a single culprit should be spared while no innocent should be punished.

"One has to take a humane approach while looking at the time spent by them (the seven convicts) in jail but everything should be within the legal framework," she said after paying obeisance at the Lord Venkateswara Temple in Chennai.

Tamil Nadu government had on Wednesday informed the Centre about its decision to remit the life sentence of all seven convicts in the assassination case - V Sriharan alias Murugan, T Suthendraraja alias Santhan, A G Perarivalan alias Arivu, Jayakumar, Robert Payas, Ravichandran and Nalini- and sought Centre's views on the matter.