Even as the state continued its relief work, Karunanidhi alleged that the devastating floods in Chennai was caused by the "neglectful, anti-people administration of the Jayalalithaa headed Tamil Nadu government", resulting in the death of innocent people and damage to property.
The crux of the opposition charge and also in a section of media, is that in the last week of November when Chennai witnessed moderate showers, the discharge volume from Chembarambakkam reservoir was trammeled.
Against this backdrop, Karunanidhi alleged that the Public Works Department did not take any "precautionary steps" for staggered release of water in advance, despite forecast of heavy rains and experts' caution over the dam's capacity.
Seeking a probe, he said, "I urge you to constitute a Commission of Inquiry headed by a sitting High Court Judge to go into the delayed opening of the sluice gates of Chembarambakkam reservoir."
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He also wanted the probe to cover CM Jayalalithaa, her Cabinet colleagues and top officials under the canons of "command responsibility."
Other opposition parties like Congress, MDMK, CPI(M), CPI
and Viduthalai Chiruthaigal Katchi have also backed the demand.
"A commission of Inquiry, headed by a sitting High Court Judge must be constituted to go into the discharge of flood waters from Chembarambakkam reservoir," a joint statement by People's Welfare Front leaders like Vaiko, G Ramakrishnan (CPI-M), R Mutharasan (CPI) and Thol Thirumavalavan (VCK) said.
BJP Tamil Nadu State chief Tamilisai Soundararajan said it would be good if the government clarified the issue.
Meanwhile, government continued relief work, inclusive of holding medical camps and ministers distributing assistance.
A release from the office of Minister of State Pon Radhakrishnan said toll plazas in Tamil Nadu will not charge fee for one more week till Dec 18 following his representation to Prime Minister Narendra Modi.
The Coast Guard said it was continuing relief work in waterlogged areas here and in Cuddalore for the 10th consecutive day.
Actors, including Karthi, Arya and Varalakshmi took up cleaning work and held a medical camp in flood-hit areas.