Congress workers perform a special prayer for better election results at the Congress party headquarters in New Delhi, India, May 23, 2019.

Police officers stand guard outside a vote counting centre in Kolkata, India, May 23, 2019.

Election staff members count votes inside a vote counting centre in Ahmedabad, India, May 23, 2019.

Supporters of Bharatiya Janata Party (BJP) celebrate after learning of initial poll results in Ahmedabad, India, May 23, 2019. Image used for illustrative purpose.

Election staff members wait for counting to start inside a vote counting centre in Ahmedabad, India, May 23, 2019.

Election staff members carry electronic voting machines (EVM) at a vote counting centre in Mumbai, India, May 23, 2019.

BJP supporters celebrate after learning the initial election results outside the party headquarters in New Delhi, India, May 23, 2019.

Supporters of Bharatiya Janata Party (BJP) celebrate after learning of initial poll results in Ahmedabad, India, May 23, 2019. REUTERS/Amit Dave - RC1784D01CC0

Election staff members count votes at a vote counting centre in Mumbai, India, May 23, 2019.

Members of the media sit at the Congress party headquarters in New Delhi, India, May 23, 2019.

Election staff members open an electronic voting machine (EVM) to count votes inside a vote counting centre in Ahmedabad, India, May 23, 2019.

Congress workers perform a special prayer for better election results at the Congress party headquarters in New Delhi, India, May 23, 2019.

Election staff members sort ballot papers before counting them inside a vote counting centre in Ahmedabad, India, May 23, 2019.

Election staff members open an electronic voting machine (EVM) to count votes inside a vote counting centre in Kolkata, India, May 23, 2019.

Election staff members count votes at a vote counting centre in Mumbai, India, May 23, 2019.

Election staff members count votes inside a vote counting centre in Ahmedabad, India, May 23, 2019.

An election staff member shows a paper to polling agents after opening an electronic voting machine (EVM) inside a vote counting centre in Kolkata, India, May 23, 2019.

Election staff members count votes at a vote counting centre in Mumbai, India, May 23, 2019.

Supporters of Bharatiya Janata Party (BJP) celebrate after learning of initial poll results in Ahmedabad, India, May 23, 2019.

Police stand guard outside a vote counting centre in Ahmedabad, India, May 23, 2019.

Election staff members prepare to count votes inside a vote counting centre in New Delhi, India, May 23, 2019.

A chair and microphone are seen in front of pictures of India's former prime ministers Indira Gandhi and Rajiv Gandhi at the Congress party headquarters in New Delhi, India, May 23, 2019.