All the seven convicts are serving life term in the Rajiv Gandhi assassination case.
The State Cabinet meeting chaired by Chief Minister J Jayalalithaa took a decision to set at liberty all the seven convicts including Nalini and Perarivalan.
Others who will be released include Santhan, Murugan, Robert Pious, Jayakumar and Ravichandran.
Making an announcement in the state Assembly, Jayalalithaa said the state would send the Cabinet decision to the Centre seeking its nod as required under Section Cr.Pc section 435 as the case was filed by CBI in the case.
"If there is no reply within three days from the Centre, the state government will release all the seven under Cr.Pc section 432 in accordance with the powers vested with the state government", she declared.
With this decision, the seven serving life term could be free from jail in three days time.
Rajiv Gandhi was killed on 21st May 1991. His assassins were convicted by a TADA court in January 1998 and were awarded death sentence, which was confirmed by the apex court on May 11, 1999.