Mexico seizes nearly 500 pounds of fentanyl from Spain

Mexican customs authorities say they have seized almost 500 pounds (220 kilograms) of a chemical used to make the synthetic opioid fentanyl at a cargo terminal at the Mexico City airport

It was another sign that Mexican traffickers may be having a harder time getting their hands on fentanyl and precursors from their usual suppliers in Asia.

So far this year, Mexico has seized two shipments of medicinal fentanyl in glass capsules, suggesting they may have been diverted from a lab, pharmacy or hospital.

Mexican traffickers usually perform final chemical steps to make fentanyl, cut it and press it into counterfeit pills, and smuggle it into the United States. Traffickers have also been mixing fentanyl into heroin to make it stronger.