Another 22 cases of bird flu have been confirmed on a island in north Germany, a lab reported on Tuesday.

The new cases were found on the island of Ruegen, said a report released by the Friedrich-Loeffler institute.

So far, a total of 103 cases of the deadly H5N1 virus have been found in wild birds in the country and most of them were reported on the island.

Bird flu was first confirmed on the island last week and later it was also found on the mainland.

No domestic birds or humans have been diagnosed with the virus in Germany. The public has been warned not to touch any dead animals or birds.

A mass culling of poultry on Ruegen was underway to prevent the virus from infecting domestic birds. The sale and transport of poultry is banned for 21 days on the island, which has emerged as a major tourist destination in recent years.

Troops have been sent to the island to tackle the spread of bird flu. They helped disinfect both vehicles and people on the island and clear away dead birds.

German Chancellor Angela Merkel traveled there on Sunday and vowed that her government would do everything it could to contain the virus from spreading to domestic poultry.