english: Officers progressed on security when a group of around 1,800 migrants per week came across the border in Piedras Negras, Mexico.
non_english: Pejabat wiwit nglindhungi keamanan minangka klompok saka 1.800 migran teka seminggu kepungkur ing seberang perbatasan ing Piedras Negras, Meksiko.