Indian fishermen in more than 600 fishing boats returned without fishing at Rameswaram here after Sri Lankan Naval personnel allegedly pelted stones and bottles to prevent them from crossing the International Maritime Boundary Line near Katchatheevu,fisheries department officials said on Tuesday.
Stones and glass pieces were found strewn in more than 30 boats, and fishermen in more than 600 boats had to return on Monday night without fishing, they said.
Katchatheevu is an islet ceded to Sri Lanka by India in 1974.
The fishermen said they could not get any fish in the Indian waters.