Fourth H5N1 bird flu centre found in Poland

WARSAW (Reuters) - A fourth centre of the H5N1 bird flu virus has been found in central Poland, about 50 km (30 miles) from three sites found last week, chief veterinary officer Ewa Lech said on Saturday.

The emergency services, following a standard procedure, set up a safety perimeter around the sites.

"The problem is the farm on which the virus was found is a big one, tens of thousands of birds," Lech told Reuters.

The latest cases of the virus were the first of bird flu amongst poultry as opposed to wild birds reported earlier.

Poland's agriculture ministry scheduled a press conference on Sunday at 4:00 p.m. EST.

(Reporting by Patryk Wasilewski)