First group of migrant children arrive in Long Beach Published First group of migrant children arrive in Long Beach LONG BEACH, Calif. - As many as 150 migrant children arrived at the Long Beach Convention Center Thursday, beginning its operation as a shelter that will house unaccompanied minors from the U.S. Mexico border until they can be reunited with family or placed with sponsors. According to the U.S Department of Health and Human Services, the children will receive medical checks, clothing, toiletries, food and snacks. Long Beach Mayor Robert Garcia said they will also receive schooling and have recreational opportunities.