SEOUL (Reuters) - South Korea on Saturday reported a suspected bird flu outbreak at a duck farm in Yesan city, south of Seoul, the first since the latest confirmed case about five months ago, local media reported.

The suspected case is currently under tests, and the final results were due by the end of the day, Yonhap News said, citing Seoul's agriculture ministry.

Initial tests at the suspected farm, home to 5,000 ducks, had given positive readings for the avian virus, it said.

The government plans to slaughter all birds in the farm as a pre-emptive measure.

In May, South Korea culled all domestic fowl in the Seoul area in a bid to contain bird flu after confirming 31 cases of the deadly H5N1 strain in poultry in the preceding six weeks.

(Reporting by Angela Moon; Editing by Lincoln Feast)