The first case of H5N1 bird flu has been confirmed in two dead swans in Poland, the Polish PAP news agency reported on Monday.

Jan Zmudzinksi, a professor of the state Veterinary Institute, was quoted by the Polish PAP as saying that "we have confirmed it was H5N1 strain, and the molecular biology tests specific for H5 and N1 were positive."

The Samples will be sent to Britain for further examination with the results expected by mid-week.

The swans were found dead on the bank of the River Vistula in the northern city of Torun.

Concerns have been growing in Warsaw over bird flu following the detection of several cases of the virus in neighboring Germany last month.