The Mexican unit of scandal-hit Italian food group Parmalat has said it has had its accounts unfrozen and expects its business to return to normal in the next few days.

Banamex, the Mexican arm of US finance group Citigroup, had frozen the accounts of Parmalat de Mexico, meaning the dairy company was unable to pay its suppliers.

Many of the company's suppliers halted shipments to Parmalat's plant, causing the company's daily milk supply to fall to 50,000 litres per day from an average of 200,000 litres per day before the crisis, reported Reuters.

"Parmalat Mexico starts now a reorganisation period that will allow it to resume its commercial operations gradually," the company said in a statement. 

"Many of the dairy farmers are willing to resume (supplies). We expect supply could rise to about 150,000 litres per day by next week," Ivan Espinosa, Parmalat de Mexico's sales director, told Reuters.