Mukherjee, Congress President Sonia Gandhi and former Prime Minister Manmohan Singh paid floral tributes to the leader at Shakti Sthal.
Congress Vice President Rahul Gandhi and other senior party leaders Motilal Vora, Ahmed Patel, Ashok Gehlot also paid tributes to Indira Gandhi.
Several leaders from Delhi Pradesh Congress Committee and Indian Youth Congress were also present along with Delhi Pradesh Mahila Congress chief Barkha Singh.
Devotional songs were played at the venue. A speech made by Indira Gandhi was also played on the occasion.
Indira Gandhi was assassinated by her bodyguards on October 31, 1984.