Many leaders have tweeted their condolences. He was known for his friendships across many spheres of life. "Saddened by his demise". We express our condolences to his family and loved ones. "Om Shanti", Prime Minister Narendra Modi tweeted.
Hours after Amar Singh breathed his last, Amitabh Bachchan shared a monochrome picture of himself on social media with his head down. My honest condolences to the family of Shri Amar Singh ji. The early days of post first-phase of liberalisation saw Amar Singh play a role in giving a push to reforms in telecom and petroleum sectors, a contribution recalled by former Union Minister Jairam Ramesh today.
Singh was expelled from the Samajwadi Party in 2017 after rift between Akhilesh Yadav and Mulayam Singh, his father, started to widen. He is survived by wife Pankaja and twin daughters.
Singh was quite active on social media despite his illness.
Venkaiah Naidu to Madhya Pradesh Chief Minister Shivraj Singh Chauhan condolences poured in as the news broke.
Amar Singh was the general secretary of the Samajwadi Party and a member of the Rajya Sabha. "We had very close relations". But in 2016, their relationship took on strains after Mr Singh went public with his complaints against Jaya Bachchan, a Samajwadi Party leader.
In February this year, Amar Singh released a video expressing "regret" over his behaviour towards Amitabh Bachchan and his family.
Earlier this morning, Singh had tweeted a tribute to freedom fighter and educationist Bal Gangadhar Tilak on his death anniversary and also wished Eid Al Adha to all his followers.