close Video Massive group of migrants flood southern border Fox News correspondent Bill Melugin is on the scene in Del Rio, TexasEXCLUSIVE: The number of detainees who tested positive for COVID-19in the Rio Grande Valley( RGV) Sector alone has increased by 900%, according to information obtained by Fox News. There were 135 detainees who tested positive in the first two weeks of July alone, marking a 900% increase in confirmed positive cases compared to the previous 14 months. MIGRANT ARRESTS AT