In Kerala, the Directorate of Revenue Intelligence officials on Thursday arrested a Sri Lankan national for trying to smuggle over one kilogram of gold biscuits to the country.DRI sources in Kochi said the 14 gold biscuits were found concealed inside the body of (rectum) Altaf Shahul Hameed, who reached the Cochin International Airport on a Sri Lankan flight.The contraband is worth about 36 lakh rupees.