An Iranian ship with 12 persons on board was seized by the Indian coast guard about 52 nautical miles away from Kerala coast on Sunday.
The initial probe showed the fishermen were from Iran who drifted into Indian waters after there were technical snags in the ship.
The Indian Coast Guard handed over them to the local police who have registered a case against them under the Suppression of Unlawful Acts Against Safety of Maritime Navigation 2002.
The Thiruvananthapuram city police commissioner H Venkitesh said the fishermen would be produced before a court on Monday. “They claim as fisherman from Iran, who got stranded in Indian waters after their ship developed some technical problems. We have to verify their claim and investigation is going on,” said the commissioner.
Intelligence sources said the coast guard seized the ship from Indian waters after specific intelligence input.
However, no explosives, weapons or contraband items were recovered from the ship, which has a length of 20 meters.
Sources said the occupants of the ship said they had left Kalat port in Iran on May 25 for fishing. However, their ship got some mechanical trouble leading to the vessel drifting into Indian waters.
Of the occupants, two belong to Balochistan province in Pakistan, sources said.
Investigation is going on to verify their identity, the sources added.
Nothing other than fishing equipment has been recovered from the ship.