New Delhi, Jan 11 (Agencies): At a time when RSS leaders are being linked to some major blasts in the country, BJP president Nitin Gadkari on Tuesday came out in defence of the outfit and said the charges against it were an outcome of "vote bank politics".

"First, there was talk of involvement of outsiders in the Samjhauta Express blast, as stated by America also. Now, saying another thing... it is all vote bank politics," he said on the probe into the 2007 explosions in the India-Pakistan train service which claimed 68 lives.

Earlier, Lashkar-e-Toiba was suspected to have carried out the attack and even the US had imposed sanctions on its operative Arif Qasmani citing his role in the Samjhauta Express blast.

"Patriots are projected as trouble causers, whereas those convicted in Parliament attack case are yet to face the gallows," Gadkari said while releasing a book 'Secrets of RSS: Demystifying the Sangh'.

He was critical of slain Mumbai ATS chief Hemant Karkare and said, "I have heard of conversations that were stored in Karkare's laptop in which there were plans to kill the current RSS chief".

He said he had also heard conversations in which Karkare had labelled RSS leader Indresh Kumar as an "ISI agent".

His statements come at a time when Kumar's role is being probed by investigating agencies in connection with the Samjhauta Express blast and other terror attacks.

Karkare was killed during the 26/11 operations and senior Congress leader Digvijay Singh had claimed that the top police officer feared for his life as he had unearthed the link of RSS leaders in terror plots in the country.