Warehouse workers at American Logistics International, Inc. and Pacer International, Inc. in Carson, Calif. filed detailed complaints with the California Division of Occupational Safety and Health, or Cal/OSHA Friday.

Both warehouses are contracted by Walmart to load and unload its merchandise including toys, bikes, house wares and more that arrives by ship through the ports of Los Angeles and Long Beach. Workers made their complaints public Monday as truck drivers at American Logistics went on strike to protest retaliation.