In a swift operation, the Indian Coast Guard has detained a Sierra Leone-flagged vessel with 25 armed guards on board, at Tuticorin. The vessel, 'Seaman Guard Ohio' is owned by US-based maritime security firm AdvanFort, but those on board were unable to explain why they had entered Indian waters, reports 'The Hindu'. 'The Hindu' cites Inspector-General and Commander Coast Guard (Region East) Satya Prakash Sharm as stating that the operations centre received information late on Friday that a vessel with armed guards on board was seen near the Tuticorin coast.