Roughly 3,600 asylum seekers, mostly from southern Mexico or Central America, were in Mexicali, in Mexico's Baja California state, as of October 1, waiting for months to apply for asylum or to return to the United States for immigration court hearings, according to Altagracia Tamayo, manager of the Cobina shelter for families and children there. About, 1,500 were waiting in Nogales, in Sonora state, and 1,250 in San Luis Rio Colorado, south of Yuma, Arizona, according to officials managing the wait lists in those cities.