The actor, who is now in home quarantine, says he's 'asymptomatic'.
The 74-year-old actor said he is asymptomatic and is doing "absolutely fine."
Singh enacts rookie cop Imran Ansari in the Amazon series produced by Anushka Sharma
Anil Kapoor, R Madhavan, Esha Gupta and Armaan Malik were among those who shared their feelings on social media.
Zafar Masud has roots in western Uttar Pradesh's Amroha.
The lyricist and his actress wife spoke up on Twitter to express their sadness.
Many celebrities took to social media to express grief over the tragic incident.
The song is about her journey so far and the love and hope that illuminated it.
The video has been shared by Mumtaz's daughter Tanya Madhvani on her Instagram account.