Demonstrators attend a protest rally against a new citizenship law, in Bengaluru, India, December 23, 2019. REUTERS/Stringer NO ARCHIVES. NO RESALES.

Demonstrators hold torches as they attend a protest rally against a new citizenship law, in Kolkata, India, January 2, 2020. REUTERS/Rupak De Chowdhuri

Police officers detain demonstrators during a protest against a new citizenship law at Red Fort in Delhi, India, December 19, 2019. REUTERS/Adnan Abidi

Demonstrators carry portraits of Indian freedom fighters and academics during a protest rally against a new citizenship law, in Kolkata, India, December 24, 2019. REUTERS/Rupak De Chowdhuri

Police in riot gear keep watch during a protest against a new citizenship law, in Seelampur area of Delhi, India, December 20, 2019. REUTERS/Danish Siddiqui

Demonstrators shout slogans as they attend a protest rally, organised by various Muslim political and religious organisations, against a new citizenship law, in Kochi, India, January 1, 2020. REUTERS/Sivaram V

A demonstrator reacts as he is detained by police during a protest against a new citizenship law, in New Delhi, India, December 27, 2019. REUTERS/Anushree Fadnavis

Demonstrators try to save a fellow demonstrator from being detained by police during a protest against a new citizenship law, in New Delhi, India, December 27, 2019. REUTERS/Anushree Fadnavis

A demonstrator displays a placard as she attends a protest rally against a new citizenship law, in Kolkata, India, January 3, 2020. REUTERS/Rupak De Chowdhuri

Demonstrators hold a tricoloured flag in front of the India Gate during a demonstration against what they say was an alleged police action conducted during recent protests against a new citizenship law, in New Delhi, India, December 30, 2019. REUTERS/Adnan Abidi

Demonstrators hold the national flag of India as they attend a protest against a new citizenship law, after Friday prayers at Jama Masjid in the old quarters of Delhi, India, December 20, 2019. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

Demonstrator display placards and shout slogans during a protest against a new citizenship law, in New Delhi, India, December 19, 2019. REUTERS/Anushree Fadnavis

A supporters of India's main opposition Congress party waves the party's flag during a protest rally against a new citizenship law, in Guwahati, India, December 28, 2019. REUTERS/Anuwar Hazarika