A border patrol official says it 's probable they are immigrants . The bodies have not been identified , the Maricopa County Sheriff 's Office says . Activists say border deaths are on the rise as security forces more dangerous immigrants . ( CNN ) -- Authorities found four human bodies abandoned in the Arizona desert Thursday . Border patrol officials have said that more security is necessary to protect them .
A border patrol official says it 's probable they are immigrants . The bodies have not been identified , the Maricopa County Sheriff 's Office says . Activists say border deaths are on the rise as security forces more dangerous immigrants . Border patrol officials have said that more security is necessary to protect them .