Laboratory tests have confirmed that the bird flu which affected turkeys at a Czech farm carried the H5N1 form of the virus, officials announced Thursday.

The farm is in the village of Tisova, in the eastern part of the Czech republic, some 150 km east of Prague. Almost a third of the 6,000 turkeys on the farm died this week, according to reports.

The State Veterinary Authority said Thursday that the H5N1 strain had been identified after laboratory tests, Reuters reports, a form potentially deadly for humans. This is the first time a poultry farm in the Czech republic has been infected with bird flu.

Before this, only wild swans were found on Czech territory suffering from the disease.

Upon coming to investigate the case Thursday, epidemiologists, firefighters and soldiers isolated the remaining birds and cordoned off the farm, CT24 news channel reported.

“The farm has been sealed off and the flock is being liquidated,” Farm Minister Petr Gandalovic said in a statement. “There certainly is no reason to panic, there is no danger to people if they stick to basic hygiene rules.”