As violence spirals across the border in Mexico, law enforcementofficials on the U.S. side of the Rio Grande Valley in south Texas saythey have not seen significant spillover.

• 暴力螺旋越过边界的墨西哥，执法人员在美方对里奥格兰德河谷南部的得克萨斯州说，他们还没有看到显着的外溢。