Telangana Minister Vakiti Srihari performed cardiopulmonary resuscitation (CPR) on a personal assistant of an Indian Administrative Service (IAS) officer who collapsed right outside the assembly.
Videos recorded on a mobile camera showed the minister giving the official chest compressions.
The man has been identified as Krishna Mohan Raju, 50, a section officer in the state's energy department.
He was rushed to a hospital, but he died on the way.
He is suspected to have died of a cardiac arrest, PTI reported.
The Telangana Secretariat Association has condoled over Raju's death.