Mexico City ? Federal agents seized $206 million believed to be tied to the methamphetamine trade and detained seven people at a luxury home in one of Mexico City’s most upscale neighborhoods, officials said Friday.

The attorney general’s office said it was Mexico’s largest seizure of drug money.

The agents also seized eight luxury vehicles, seven weapons and a machine to make pills Thursday from the home in the Lomas de Chapultepec neighborhood, a collection of walled compounds that is home to ambassadors and Mexican business magnates.

The U.S. dollars were hidden inside walls, suitcases and closets.

President Felipe Calderon praised the seizure as part of his crackdown against drug trafficking. Since taking office Dec. 1, Calderon has sent some 20,000 police and soldiers into drug strongholds a to battle trafficking gangs.