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, officials said at a news conference Thursday.

The shooting at daybreak Wednesday targeted the ICE building, including a van in a gated entryway that held detainees. One detainee was killed, and two other were critically wounded. No ICE personnel were hurt.

The gunman, Joshua Jahn, 29, who fatally shot himself, "carried out a targeted, ambush-style attack on law enforcement," said Joseph Rothrock, the agent in charge of the FBI Dallas field office.

He said the manner in which Jahn carried out the shooting suggested he "specifically intended to kill ICE agents."

Jahn fired at ICE vehicles and fired multiple shots into "th

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