Freetown police seized 30 pounds of marijuana found at a warehouse Friday morning, police said. Security staff at a Stop & Shop food distribution facility alerted authorities after discovering the marijuana, police said in a statement. The marijuana had been included in a tractor-trailer shipment of vegetables received from a California shipper. Freetown police and a State Police K-9 team searched the facility, but no other contraband was found. Police said Stop & Shop is cooperating with the investigation.