The discovery came Wednesday, the same day an army patrol in another location found a sophisticated underground meth lab reachable by a 35-yard (meter) long tunnel.
Mexico has become a center for meth production, based on precursor chemicals shipped in from foreign suppliers, often in Asia.
The Defense Department said soldiers found thousands of sacks of phenylacetamide in a warehouse in the north-central state of Queretaro.
Photos from the scene of the raid showed the phenylacetamide stacked several yards (meters) high, and hundreds of drums of other chemicals also used to make meth.
In 2010 authorities seized 200 tons of precursor chemicals at the seaport of Manzanillo, a raid that the Attorney General’s Office described at the time as the largest in Mexican history.
Traffickers have increasingly turned to such chemicals after Mexico imposed tight restrictions on pseudoephedrine, the most popular raw ingredient for meth.
In the northern state of Sinaloa, meanwhile, the army said soldiers found a sophisticated underground meth lab in a rural area near the coastal city of Mazatlan.
Construction was apparently continuing on the structure, which included a 1½-yard-wide entrance tunnel, a power generator, three large mixing chambers and a welding machine.
In the neighboring state of Durango, police found the bodies of four naked men late Wednesday who had been strangled with their heads taped near a nursery in the state capital, also called Durango.
A mechanic and another man were shot to death Wednesday in Ciudad Lerdo, a town in Durango’s Comarca Lagunera region where the government sent additional security forces in May in response to stepped-up cartel violence.
Since late 2006, the government has been waging an offensive against drug cartels across Mexico that has led to widespread violence. More than 35,000 people have been killed, according to official figures, while some groups put the number at more than 40,000.
