Stalin is leading the hunger strike in Tiruchirapalli, around 350 km from here. Other leaders are protesting in various districts.
The DMK and other opposition parties on February 18 demanded secret ballot or adjournment of the assembly session by a week after Chief Minister K. Palaniswami moved the confidence motion.
Speaker P. Dhanapal refused to accept the demand.
DMK members then sat in protest inside the assembly and were later evicted by marshals.
The DMK on Tuesday gave a letter intimating the party’s decision to bring a no confidence motion against Dhanapal.