Three California men were caught making off with $1 million worth of Lego toys in two box trucks on April 8, the authorities said. According to the Kern County Sherrif’s Office, deputies from the Mojave Substation responded to a call about suspicious vehicles. When they searched the trucks, they discovered “a large amount of Lego products,” the sheriff’s office said in a news release. The men now face cargo theft charges.

The New York Times said it was not clear whether the men had intentionally targeted the shipments of the plastic bricks, which have become more elaborate and valuable for customers who treat them as commodities.

Read More: Cargo Theft Has Evolved Into A Coordinated Commercial Operation

The men who were arrested on April 8, Jose Lopez, 37, of San Bernardino; Ruben Lopez Flores, 25, of Los Angeles; and Freddy Hernandez Polinar, 35, of Chino, Calif., had fled in box trucks near Silver Queen Road in Mojave, California, after The men were arrested on charges of possession of a stolen vehicle, cargo theft, and conspiracy charges, according to the sheriff’s office. It was unclear on Saturday if the men had been arraigned in court or if they had any legal representation.

One of the trucks, in a photo released by the sheriff’s office, had an Amazon arrow on a blue background on its side. Amazon said on April 11 that it was gathering information about the case.