The Lankan Naval personnel also allegedly damaged fishing nets and other equipment besides seizing their boat, Assistant Director of Fisheries Kolinjinathan said.
The fishermen from Thangachimadam here have been taken to Kangesanthurai, the official said.
On February 1, five Tamil Nadu fishermen were arrested and their boat impounded by the Sri Lankan Navy for allegedly fishing in Lankan territorial waters.
Raising the fishermen's issue, the Tamil Nadu government had on February 2 sought Prime Minister Narendra Modi's intervention in securing release of 25 fishermen and 119 fishing boats from Lankan custody.