According to Focus Taiwan, the official said that the farm is located in the county's Fangyuan Township, where about 8,000 eggs were barred from leaving the farm pending further examination.

However, the owner of the egg farm denied ever using the insecticide, leading to suspicion that the contamination might have come from insecticides used by a neighboring rice farm.

Changhua County Public Health Bureau Director Yeh Yen-po said the incident has been reported to the public health bureau in Hsinchu City, where the fipronil-polluted farm has been selling its eggs to wholesalers.

Further inspections will be conducted and tainted eggs will be taken off store shelves, Mr Yeh added.