By Debora Ely and Ana Mano MONTENEGRO, Brazil (Reuters) -Brazilian authorities hope to determine by Tuesday whether a confirmed outbreak of highly pathogenic avian influenza among wild birds in a zoo in the southern state of Rio Grande do Sul is connected with the country's first bird flu case on a commercial poultry farm in the same state,

Mexico, Chile and Uruguay have halted poultry imports from Brazil after the country confirmed its first bird flu outbreak on a commercial farm.

Brazilian authorities are investigating a bird flu outbreak among wild birds in a zoo in Rio Grande do Sul. They aim to determine if it's linked to a case at a nearby commercial poultry farm. The outbreak has already led to thousands of poultry deaths and precautionary measures.