Mexico says it found nearly one ton of cocaine hidden inside frozen shark carcasses.
Prosecutors say hundreds of packages stuffed in the bellies of dozens of dead sharks seized in the Gulf port of Progreso contained 1,965 pounds (893 kilograms) of cocaine.
The Attorney General's Office says the sharks were found in two containers on Tuesday.
The containers had been shipped from Costa Rica. There was no immediate information on its intended destination.
The 870 packages were found wrapped in plastic and inserted in the sharks.
Drug traffickers are increasingly shipping drugs bound for the U.S. market through Central America.
The prosecutors comments were made on Wednesday.