Mexican bread maker Bimbo has said it has made several management changes in the last few weeks, but gave no reason for the changes.

As part of the changes, the company's operations officer for Mexico, Rafael Velez, has retired and is to be replaced by Pablo Elizondo, reported Reuters.

Reynaldo Reyna is to become head of operations in the US, succeeding Juan Muldoon.

The company is due to report its fourth-quarter results to day [Wednesday] and is expected to post a significant rise in operating profits due to price rises and increased distribution efficiencies.