Mexican broadcaster Televisa 2 aired what it said were exclusive scenes from the film made by Antenna 3 in Spain. It was shown in Spain on Monday and in Mexico on Tuesday.
In one scene, two Spanish reporters using hidden cameras, posed as potential buyers of organs, and filmed a Mexican priest called Friar Martin who agreed to find them a kidney.
"I can't promise as it will be difficult in this country ... but there are, (kidneys available)," he said. "It's not so easy ... one can end up in jail ... it's a very delicate issue," he added.
The clips also showed a doctor at the Santa Fe Hospital in an affluent neighborhood of the Mexican capital apparently agreeing on film to participate in the selling of the kidney, for which a price of $900,000 was agreed.
The Mexican health ministry issued a statement saying it was investigating allegations of a link between the hospital and human organ traffic. So far authorities haven't discovered any irregularity.
CBS Worldwide Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. Reuters Limited contributed to this report