Sri Lankan navy gunners load firearms on a patrol boat just before their patrol at Kallpitiya, about 40 km (25miles) north of Colombo, July 2, 2006. Sri Lanka's navy sank a Tamil Tiger vessel approaching a military base at the island's northern tip overnight, naval officials said on Saturday, the latest in a series of clashes to stoke fears of a return to civil war. Picture taken on July 2, 2006. REUTERS/Anuruddha Lokuhapuarachchi