A total of 3,000 barrels of chemicals used to produce synthetic drugs were seized and three suspects were arrested in a raid in Guatemala, Agencia EFE reported. The chemicals were found at a warehouse in San Jose Pinula, a city on the eastern outskirts of Guatemala City, the National Civilian Police, or PNC, said. Officers and prosecutors searched the warehouse and found four vans loaded with chemicals used to manufacture synthetic drugs, the PNC said. Two of the vans had Mexican tags and one had been reported missing several months ago. Luis Reina Escobar, 53, Mario Uleu Alvizures, 60, and Isaias Alvizures Lorenzana, 24, all Guatemalan citizens, were arrested, the PNC said. Guatemala is used by foreign drug cartels to move drugs from South America into Mexico and eventually the United States. Los Zetas, considered Mexico''s most violent drug cartel, was blamed for the massacre of 27 peasants in May at a ranch in Peten province, which borders Mexico and Belize.