The gunman who opened fire on an Immigration and Customs Enforcement facility in Dallas hated the U.S. government and wanted to incite terror by killing federal agents.

A gunman fired on a Dallas immigration field office from a nearby roof, killing one detainee and critically wounding two others, before killing himself.

Authorities say a 27-year-old man was killed after opening fire at a U.S. Border Patrol facility in McAllen, Texas.