Over 20 crore people from Assam, Bengal, Kerala, Tamil Nadu and Puducherry are voting in a huge electoral exercise today.
For the latter three, this is the first and only phase of polling.
It is Assam's third and final, while Bengal has five more.
The 140 seats of neighbouring Kerala also vote in a single phase today, with the LDF government led by Chief Minister Pinarayi Vijayan looking to retain power.
In Assam, the final phase sees 40 seats in play, with the ruling BJP targeting a second term.
Puducherry is currently under President's Rule after the dramatic collapse of the V Narayanasamy-led Congress government.
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