Security measures have been heightened in view of the violence in the previous phases, particularly the death of five people in Cooch Behar in the fourth round of polling on April 10, an Election Commission official said.
The poll panel has deployed at least 796 companies of central forces in the seventh phase to ensure free and fair voting, he said.
It has also put in place measures to ensure strict adherence to health protocols during the election process, including wearing face masks and maintaining social distancing.
The state registered its highest single-day spike of 15,889 COVID-19 cases on Sunday, while 57 more people succumbed to the virus.