New Delhi, Jan 13 (Agencies): Congress on Thursday welcomed a special court's permission to CBI to reinvestigate the Malegaon blast of 2006 in wake of "confession" statements made by Swami Aseemanand linking Hindu groups to terror acts.

"It is very good. We welcome it," party General Secretary Digvijay Singh told reporters when asked to comment on the order of the Special MCOCA court in Mumbai on the blast that left 37 people dead and over 100 injured.

Asserting that Congress does not believe in saffron terror, he said that anyone guilty of terror activities needed to be punished.

Referring to RSS Chief Mohan Bhagwat's remarks, he asked as to why he did not inform the CBI when he was aware of the presence of "doubtful elements" in the organisation.

"I only want to say that in case Bhagwat had information about such doubtful elements why he did not inform the police or the CBI about them," Digvijay said.

The RSS chief on Sunday had admitted in Gujarat that some of its members, who held radical views, were told to leave the organisation.

Singh said even now, if there were some "suspicious" elements in the RSS, it was Bhagwat's duty to tell the police or the investigating authorities about them.

The senior Congress leader asserted that time had come for BJP and RSS to introspect and find out "as to why unwanted elements had become associated with the Sangh Parivar."

At a public meeting in Surat, Bhagwat had said, "Of the majority of the people whom the government has accused (in various blast cases), a few have left voluntarily and a few (have been) told by the Sangh... this extremism will not work here, so you go away."

Asked whether the Muslim youth who have been arrested in connection with the Malegaon blasts should now be freed in the wake of the disclosures of Aseemanand, he said that it was for the investigate agencies to look into the matter and "we will not like to interfere".

"If there is no case against them, certainly they should be freed," he said.

On the issue of security to Rahul Gandhi who faced some demonstrations in Uttar Pradesh, Singh, who is in charge of party affairs in the state, said, "The SPG is responsible for the security of the VVIP and the state police is taken into confidence by the SPG so that the life of the VVIP is protected."