Honduran anti-drug agents have seized a record 14 tonnes of chemicals set to be used to produce methamphetamine, part of an ongoing operation that has netted $100 million in assets, federal prosecutors said.

The chemicals were discovered on Friday underneath a house in the town of Patagallina in the northern region of Yoro, located along a major drug-smuggling route used by Mexican and Colombian cartels to bring drugs to the United States, said Carlos Vallecillo, spokesman for the federal prosecutor's office.