36 migrants were found under a load of gravel in the secret compartment of a dump truck
(CNN) -- A tip from an anonymous caller led police in Laredo, Texas, to a surprising discovery: 36 migrants trapped in a hidden compartment inside a dump truck that appeared to be hauling gravel. Later that morning, they received a call reporting that people were concealed in a compartment inside the vehicle. Investigators found that plywood sheets had been installed inside the truck, creating the hidden compartment. The migrants who'd been trapped in the truck are now in the custody of federal immigration authorities, police said. In the past, CBP has released reports of large groups of migrants trapped inside trucks and warned that smugglers are placing migrants' lives in danger.