Three detainees at a Dallas Immigration and Customs Enforcement facility were shot on Wednesday, Sept. 24, killing one, in what authorities have called a targeted attack on law enforcement, though no officers were wounded.

The shooting unfolded at a ICE field office in Texas at about 6:40 a.m. on Sept. 24 when a suspect poised on a nearby rooftop opened fire, authorities said. The shooter also died of an apparent self-inflicted gunshot wound and was found near an unspent shell casing with "ANTI-ICE" written on it, according to FBI Director Kash Patel.

As investigators work to identify a motive in the shooting, the FBI alleged in an update on Sept. 25 that the evidence so far has revealed a high degree of planning in the attack and a desire to instill "real terror" in ICE agents.

It was the latest shooting to stir a tense national debate over political rhetoric and acts of violence. Two weeks earlier, conservative activist and President Donald Trump ally Charlie Kirk was killed with a single shot during a speaking event at a Utah university. As a result of the Sept. 24 shooting, ICE facilities are ramping up security, officials said.

"This is wrong. Politically motivated violence is wrong," Texas Sen. Ted Cruz said.

Authorities have yet to officially name the suspect, but media outlets including CNN, NBC and The New York Times reported that he was identified as Joshua Jahn, citing anonymous sources familiar with the investigation. Officials with the Dallas Police Department and ICE didn't immediately return requests for more information on the suspect early on Sept. 25.

Here's what we know about the shooting so far:

White House targets ICE notification app, developer responds

White House Press Secretary Karoline Leavitt highlighted reports that the alleged shooter in Dallas had previously used a popular app that flags sightings of immigration officers.

Leavitt criticized CNN for reporting on ICEBlock in June and noted the app’s tie to the “leftist lunatic shooter” in Dallas this week. Patel released details about the shooter’s Internet history, including using “apps that tracked the presence of ICE agents,” without naming ICEBlock.

ICEBlock’s developer Joshua Allen defended the service in an interview with USA TODAY in the wake of the shooting. He said the theory that reported sightings of ICE officers led directly to this week’s shooting was far flung.

"Somebody would have to see the enforcement action, be within 5 miles of the report and then somehow say, OK, now they’re done so they’ll be back to the booking facility soon," Allen said. "This is insanity."

Allen said reported ICE activity sightings are purged every four hours and that no predictive analytics are performed to anticipate ICE movements. The app is anonymous and does not track logins. As of this month the app has 1.1 million active users, Allen said. He cited case law upholding the legality of the Waze app, which flags speeding enforcement by police.

Allen said he’s yet to receive any communication from the government.

“I have an amazing legal team, and it makes no sense for them to try to do anything to shut it down,” Allen said. “So that leaves them with these performative statements and trying to bully me.”

−Nick Penzenstadler

Shooter planned attack: FBI

Patel said investigators gathered evidence showing a “high degree of pre-attack planning” in the deadly shooting at an ICE facility in Dallas.

The shooter allegedly downloaded a document containing a list of Department of Homeland Security facilities, searched for apps that tracked the presence of ICE agents, sought information on ballistics and looked into video footage of the assassination of Charlie Kirk, the FBI director shared on X.

Patel also said investigators recovered a handwritten note reading, "Hopefully this will give ICE agents real terror, to think, 'is there a sniper with AP (armor piercing) rounds on that roof?'"

The writings and search history was retrieved from electronic devices and other items seized from the shooter's home, Patel said.

How did the shooting at the Dallas ICE facility unfold?

According to a City of Dallas database of active police calls, 38 police units responded to a 6:38 a.m. call for assistance at 8100 N. Stemmons Freeway, where the local ICE facility is located.

Authorities said a shooter up on a nearby rooftop fired "indiscriminately" at the building and a van holding the detainees in a sallyport.

Three detainees were shot, with one killed and two in critical condition, the Department of Homeland Security said in the latest update. Earlier updates from DHS indicated two victims had died.

Among the victims of the shooting was a Mexican national who was left "seriously injured," the country’s Ministry of Foreign Affairs said in a statement.

Anti-ICE messages found on rounds

FBI Director Kash Patel said an “initial review of the evidence shows an ideological motive behind this attack.”

He posted images on X of ammunition located at the scene, including one inscribed with the phrase “ANTI ICE.”

The FBI is investigating the incident as an act of targeted violence, said Joseph Rothrock, special agent in charge of the Dallas FBI field office.

“This is just the most recent example of this type of attack,” he said.

Officials condemn violence against ICE amid string of incidents

Government officials in the aftermath of the shooting said that attacks against the immigration agency "must stop."

"While we don’t know motive yet, we know that our ICE law enforcement is facing unprecedented violence against them. It must stop," DHS Secretary Kristi Noem said.

In July, an ICE facility near the Dallas-Fort Worth area was attacked in a shooting that wounded a local police officer. ICE facilities nationwide have been the site of protests, which at times have turned violent with clashes breaking out between federal officers and demonstrators. Last month, the Dallas ICE field issued a shelter-in-place order after a man approached the building and claimed to have an explosive device in his backpack, officials said.

Republicans including Vice President JD Vance have pointed to liberal rhetoric as fueling violent attacks. A study earlier this month by the libertarian think tank Cato Institute found terrorists motivated by extreme right-leaning ideology killed six times more people than those on the opposite side of the political spectrum between 1975 and Sept. 10 of this year.

Contributing: Eduardo Cuevas, Michael Loria and Lauren Villagran, USA TODAY

This article originally appeared on USA TODAY: A shooter attacked a Dallas ICE facility. What to know about shooter, victims.

Reporting by Jeanine Santucci and Christopher Cann, USA TODAY / USA TODAY

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