Kolkata: Claiming that RSS activists have been indicted in at least 13 terror cases across India, former Maharashtra inspector general of police S.M. Mushrif on Thursday described the Hindutva outfit as India's No.1 terrorist organisation.

"RSS activists have been charge-sheeted in at least 13 cases of terror acts in which RDX has been used. If organisations like Bajrang Dal are taken into the account, then the number of such cases goes up to 17," Mushrif said at an event here.