Police on Wednesday nabbed two youths and recovered at least half-a-kilogram of gold from them at Machilipatnam. Krishna district Superintendent of Police J. Prabhakara Rao said that the duo, T. Chennai Mahesh, 25, and D. Siva Narayana, 32, belonging to Guntur district have confessed to their involvement in three houses robberies in Machilipatnam. Police produced them before the court on Wednesday.