The police is not allowing live media coverage from the protest site near the Kudankulam nuclear plant.
Police had earlier stopped the media from entering the site from where protestors had been arrested over the last two days.
More than 100 protesters were detained overnight on Monday. The convenor of the protest SP Udayakumar others protestors began a fast unto death after Tamil Nadu Chief Minister J Jayalalithaa's U-turn on the nuclear power plant.
Seeking to end the impasse over the Kudankulam nuclear plant issue, the Jayalalilthaa government in Tamil Nadu on Monday gave the go ahead to the controversial project and announced a Rs 500 crore special development package for the area where it is located.
Jayalalithaa was earlier opposed to the nuclear power plant.