"Retrieval of Katchatheevu back to India and restoration of the traditional fishing rights of Indian fishermen in the Palk Bay area are the topmost agenda of the Government of Tamil Nadu," Fisheries Minister D Jayakumar said.
He said the state government had impleaded itself in a case filed by his party supremo and Chief Minister J Jayalalithaa in 2008 in Supreme Court in her individual capacity seeking retrieval of Katchatheevu.
Jayakumar also pointed out that the state assembly had twice passed resolutions urging the Centre to retrieve the islet, ceded to Sri Lanka in the 1970s.
The government has also pointed to proposed new constructions at the St Antony's Church at Katchatheevu by the Lankan government and also "substantially stepped up" presence of that country's Navy on the islet.
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"The apprehension of the Tamil Nadu fishermen is that the Sri Lankan government is moving towards further curtailing and restricting the access that they have traditionally and historically enjoyed to Katchatheevu," he said.
On the talks between fishermen representatives of the two countries, aimed at solving the fishing dispute, he said the state government was committed to continuing the process.
Three rounds of talks have been held - two in Chennai (January 2014 and March 2015) and one in Colombo in May 2014.