Newman said the transaction is comprised of three parts, a refinancing in dollars, a pre-funding component and a debt swap, but he declined to go into further detail.

"It's a very important operation within the framework of strengthening the company's financing structure," he said, noting the deal will be announced "in a matter of days".

"It's still not finished and the important point - I don't know what the size will be because the operation is still open - is what was done, for what purpose and how to consolidate one of the most important curves for Pemex which is the dollar curve."

Pemex's