Twenty fishermen from Nagappatinam in Tamil Nadu and Karaikkal district of Puducherry were arrested by the Srilankan Navy today. They were held on charges of trespassing the International Maritime Border. <br/><br/>Ten of them from Nagappattinam have been remanded till December 14 and the ten from Karaikkal till December 15. They have been lodged in Jaffna prison by the authorities.