Two suitcases carried by a woman who was about to fly to from Chile to Spain were virtually made of cocaine, police said.

Detective Leandro Morales at the Santiago airport said the drug "was not hidden in the luggage. This time the suitcases were the drug."

The suitcases were made of a substance combining cocaine with resin and glass fiber, Morales told The Associated Press.

A "chemical process" could be used to separate out the drug, Morales said, adding that the suitcases were heavier than their contents.

The 26-year-old Argentine woman was arrested.