The police have already started investigation into the issue. Meanwhile, a question over Anna's security has been raised in the wake of the threat.
Followers of the anti-graft crusader started demanding tightening of his security. Anna had received a similar kind of threat in Oct 2011.
Following the attacks on his crucial aides - Prashant Bhushan and Arvind Kejriwal, the Union Home Ministry alerted the social activist over the latent life threat.
Currently, Anna is in the national capital - Delhi and has been waiting for the Parliament's decision as discussion over Lokpal Bill is expected to take place in the House on Wednesday, Dec 14.