 Trafficking involves a process of using physical force, fraud, or deception to obtain and transport people.Types of notorious human smugglers include Snakehead gangs present in mainland China (especially in Fujian) that smuggle laborers into Pacific Rim states (making Chinatowns frequent centers of illegal immigration) and "coyotes", who smuggle undocumented immigrants to the Southwestern United States and have been known to abuse or even kill their passengers.Sometimes undocumented immigrants are abandoned by their human traffickers if there are difficulties, often dying in the process.