(The Center Square) – Federal agents made history by seizing the largest volume of precursors used to produce methamphetamine after interdicting two shipments from two ships on the high seas.

U.S. Department of Homeland Security’s Homeland Security Investigations (HSI) agents working overseas seized more than 300,000 kilograms (nearly 700,000 pounds) from two ships that departed Shanghai, China. They were headed to Mexico to be used in clandestine labs run by the Sinaloa Cartel, federal authorities said.