The Mexican government increased its tariff-free chicken import quota by 55,000 tonnes on Friday, reported Reuters, due to crimped domestic production amid avian flu outbreaks.

The announcement was made in the Mexican government's official gazette, which cited confirmed cases of avian flu in about two-thirds of the country's states.

While boosting overall imports, Mexico also banned chicken product imports from several US counties, citing a reported outbreak of Newcastle disease.

"In order to avoid a shortage ... it is advisable to keep external supply options open and expand the quota amount for imports of fresh, refrigerated and frozen chicken meat," the economy ministry said in the official gazette.

The United States has traditionally been Mexico's biggest foreign chicken supplier.

Under the new quota, buyers can import fresh, refrigerated or frozen chicken meat, including legs and thighs, which are especially in high demand by Mexican consumers.