The Congress on Friday termed "totally unacceptable and completely erroneous" the Supreme Court order directing the premature release of six convicts serving life sentence in the Rajiv Gandhi assassination case, and said the apex court has not acted in consonance with the spirit of India on this issue.

The Supreme Court directed the premature release of six convicts, including Nalini Sriharan and R P Ravichandran, serving life sentence in the case. A bench of Justices B R Gavai and B V Nagarathna said the judgement of the top court in the case of A G Perarivalan, one of the convicts in the case, is equally applicable in their matter.

In a statement, Congress general secretary in-charge communications Jairam Ramesh said the decision of the Supreme Court to free the remaining killers of the former prime minister is "totally unacceptable and completely erroneous".

"The Congress party criticises it clearly and finds it wholly untenable. It is most unfortunate that the Supreme Court has not acted in consonance with the spirit of India on this issue," he said.

Nalini Sriharan and Ravichandran had moved the top court seeking premature release.

Both of them had challenged a June 17 order of the Madras High Court, which rejected their pleas for early release, and cited the apex court judgment ordering the release of co-convict Perarivalan.

Nalini, Ravichandran, Santhan, Murugan, Perarivalan, Robert Payas and Jayakumar were sentenced to life terms in the case.

Gandhi was assassinated on the night of May 21, 1991 at Sriperumbudur in Tamil Nadu by a woman suicide bomber, identified as Dhanu, at a poll rally.