A gunman fired upon a Dallas immigration field office from a nearby roof Wednesday morning, killing one detainee and critically wounding two others before taking his own life in what authorities called an indiscriminate attack on U.S. Immigration and Customs Enforcement.

All three victims were in a transport van outside the facility at the time, the Department of Homeland Security said in a statement. Authorities said the shooter was involved in a “high degree of pre-attack planning,” hated the U.S. government and wanted to incite terror by killing federal agents.

The attack is the latest public, targeted killing in the U.S. and comes two weeks after conservative leader Charlie Kirk was killed by a rifle-wielding shooter on a roof. After the shooting in Dallas, DHS Secretary Kristi N

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