Some of the staff who have interacted with the prime minister during the 10 years of United Progressive Alliance (UPA) rule were seen wiping away their tears, the official added.
Present along with Manmohan Singh were National Security Advisor Shivshankar Menon, Principal Secretary Pulok Chatterjee, Prime Minister's Advisor T.K.A. Nair and his Media Advisor Pankaj Pachauri.
Some TV cameras and news photographers were present on the occasion.
