ROME - An Italian man threw his 16-month-old son off a bridge into the river in Rome in a fit of rage following a row with his partner over custody, Italian media reported.The man, 26, admitted to  police that he had thrown his son into the freezing waters of the Tevere river after arguing with the infant's mother. He was caught in the act by a passing prison officer, who said the father was overwrought and yelled out before throwing the child over the edge. The man, who is unemployed and has a criminal record for drug dealing, tried to flee the scene but was detained shortly afterwards by police, reports said. Divers from the fire brigade searched the river for the child, but their efforts were hampered by strong currents.