They have also demanded release of 78 fishing boats.
A decision to this effect was taken yesterday at a meeting of fishermen's panchayat leaders of Nagapattinam, Karaikal, Tiruvarur, Thanjavur, Pudukottai, Ramanathapuram, Tuticorin and Kanyakumari districts here.
Speaking to reporters after the meeting, Rajendran, president of the fishermen panchayat in Nagapattinam district, said 29 fishermen from various parts of the state are now lodged in Sri Lankan prisons.
Fishermen's associations have been organising a series of agitations since Jan 26, demanding immediate action by the Union Government, Rajendran said.
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On January 29, they had resorted to road and rail blockade at Karaikal. They also laid siege to the port in that city.
However, it had not yielded any positive result and so a decision was taken by fishermen to 'lay siege' to the Sri Lankan Deputy High Commission at Chennai on February 29, he said.