Bulgarian Food Safety Agency on Tuesday reported an outbreak of the highly pathogenic bird flu at an industrial farm.

Bird flu also called avian influenza, is a viral infection that can infect not only birds but also humans and other animals. Most forms of the virus are restricted to birds

The virus was detected in a farm for laying hens near the village of Brod, some 230 km southeast of the capital Sofia, the agency said in a statement.

All measures have been taken immediately to eradicate the outbreak.

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The 4,000 hens in the farm would be culled, it said.

According to the agency, this was the second bird flu outbreak at an industrial farm in Bulgaria this year.