Why these elections matterpublished at 03:31 BST
The results of these polls will be seen as an early test of
support for Modi and his BJP ahead of the next general election in 2029.
The BJP is aiming to retain power in Assam and make gains in
Tamil Nadu and Kerala, where it has traditionally struggled.
Much of the attention, however, will be on West Bengal which
is governed by the opposition Trinamool Congress (TMC) party.
The BJP, which has never ruled the state, has mounted a strong
challenge and exit polls suggest a close contest – though such projections have
proved unreliable in the past.
As votes are counted, we’ll bring you quick insights and analysis from each state.