The veteran Congress leader was recently diagnosed with pneumonia and was admitted to the hospital, where he died at 1.28 am.
Reddy has been a parliamentarian for several decades since 1984 and held key portfolios in various governments.
He was the information and broadcasting minister in IK Gujral government.
During the UPA-1 government he held portfolios like urban development and culture. In UPA-2, he was again assigned the urban development ministry.
Later, he became the minister of petroleum and natural gas. He was then shifted to the science and technology and earth sciences ministries.
As Information and broadcasting Minister, Reddy got the Prasar Bharati Act notified on 23rd Nov, 1997.