Indian fishermen of Rameswaram fishing near the ‘Adams Bridge’ in the narrow Palk Strait between India and Sri Lanka on Friday for the first time have found a border stone put up by Sri Lanka on the seventh islet of the chain of islets in shallow seas. The fishermen have found the border stone with the words ‘Sri Lanka’ inscribed on it and with the Island-government’s official emblem on top installed on the seventh of the chain of limestone shoals (islets) in the ‘Adams Bridge’ area in the shallow seas off Dhanushkodi. They have returned home and reported the matter to the authorities in Rameswaram, according to a fisherman who was part of the group who noticed it. Sri Lanka has installed the border stone on the 7th islet apparently to indicate its maritime border with India, while India has installed its territorial sign board on the fifth of the chain of islets, Deccan Chronicle reported. Tamil Nadu fishermen often run into trouble in the ocean waters close to Katchatheevu islet, with the Sri Lankan Navy charging the former with poaching into their territorial waters as the maritime boundary line cannot be clearly demarcated in full. ‘Adams Bridge’ or ‘Ram Sethu (bridge over the sea)’ comprises a chain of limestone shoals surrounded by shallow sea, that was once believed to have interlinked Rameswaram Island in India with Mannar off the northwestern coast of Sri Lanka. The 30-km long bridge-like structure separates the Gulf of Mannar from the Palk Strait in the Bay of Bengal near here. Whether the Adams Bridge was man-made or natural formation is still a point of debate.