Immigration and Naturalization Service v. Delgado, 466 U.S. 210 (1984), was a United States Supreme Court decision on the limits of worksite enforcement by immigration agents. Specifically, the Court ruled that factory raids by the Immigration and Naturalization Service (INS) were not illegal seizures under the Fourth Amendment to the U.S. Constitution. Summary INS v. Delgado concerned whether the restrictions placed on government officials by the Fourth Amendment applied to worksite enforcement operations by the Immigration and Naturalization Service (INS). The case was originally filed by the International Ladies Garment Workers Union (ILGWU) in 1978 on behalf of members of the union who worked at two Los Angeles garment factories (Southern California Davis Pleating Co. and Mr. Pleat) raided by the INS in January and September 1977. The raids were based on search warrants that claimed probable cause to believe undocumented workers were employed in the factories, but did not name specific workers to be questioned or detained. During the operation, some INS agents guarded the exits while others moved through the factory questioning workers about their to citizenship status. Agents arrested workers they believed to be undocumented immigrants. Four of the employees questioned filed actions against the INS in 1978, arguing that the sweeps violated their Fourth Amendment right to be free from unreasonable search and seizure, and their right to equal protection under the Fifth Amendment. The U.S. district court rejected the plaintiff's claims, but the Ninth Circuit Court of Appeals reversed the lower court's ruling in 1982, finding that the faculty raids were unlawful violations of the Fourth Amendment. The INS appealed that ruling to the Supreme Court. The Fourth Amendment to the U.S. Constitution states, "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized." The case hinged narrowly on whether a seizure took place at all, and therefore whether the protections of the Fourth Amendment applied. The Court had previously ruled that non-citizen immigrants are protected by the Fourth Amendment. Also, the Court had ruled that not every interaction between police or government officials and a suspect qualifies as a search or seizure, and that officials can approach and speak with