Amidst cheering supporters, Anna Hazare today began his three-day fast here for a strong Lokpal Bill even as Lok Sabha initiated a debate on the proposed law. Mr Hazare, who is suffering from a viral infection, arrived at the MMRDA grounds in Bandra Kurla Complex of suburban Mumbai along with his close aides Arvind Kejriwal, Kiran Bedi and Manish Sisodia to a thunderous applause.