May 17 (Reuters) - China's national refinery production in April fell 3.3% on year to 58.79 million metric tons, according to data from the National Bureau of Statistics on Friday.

April crude oil production gained 1.3% over a year earlier at 17.47 million tons and that of natural gas rose 3.2% to 19.8 billion cubic meters, the data showed. (Reporting by Chen Aizhu; Editing by Muralikumar Anantharaman)