"Extremely sad to hear this. No words to express...," AAP chief and Delhi Chief Minister Arvind Kejriwal tweeted.
Sanyal recently authored a book entitled ‘The Big Reverse: How Demonetization Knocked India Out’. She reportedly left various Whatsapp groups of AAP members last month, saying she wanted a ‘detox’ from social media.
In her 30-year-old banking career before surprising all by plunging into politics, the Kochi-born Sanyal had also served as the head of corporate finance and chief operating officer for ABN Amro for Asia.