Two detainees have died and another is critically injured after a rooftop sniper opened fire at an Immigration and Customs Enforcement (ICE) centre in Dallas, Texas, officials say.
The gunman fired indiscriminately at the ICE facility and at a nearby unmarked van, law enforcement officials say, before dying from a self-inflicted gunshot wound.
No law enforcement were injured. FBI Director Kash Patel posted a photo on X of unused ammunition recovered from the scene. One casing has the phrase ANTI-ICE on it.
It is the latest in a string of attacks on ICE facilities in recent months as the agency ramps up efforts to deliver on US President Donald Trump's pledge for mass deportations.
While the investigation is ongoing, an initial review of the evidence shows an ideological motive behind this attack, Patel wrote on X.
These despicable, politically motivated attacks against law enforcement are not a one-off. FBI special agent Joe Rothrock told a news conference that rounds found near the gunman contained messages that are anti-ICE in nature.
This is just the most recent example of this type of attack. He said the FBI was investigating it as an act of targeted violence.
Dallas police said a preliminary investigation determined the suspect had opened fire from an adjacent building.
Acting director of the Dallas ICE office Joshua Johnson told the news conference it was the second time he has had to stand in front of the media and talk about a gunman at one of his facilities. Texas Senator Ted Cruz also spoke at the news conference, condemning politically motivated violence and urging a call for civility in political discourse.
US Vice-President JD Vance and acting Homeland Security Secretary Kristi Noem echoed similar sentiments, emphasizing the repercussions of divisive rhetoric surrounding law enforcement.
The ICE field office in Dallas has been targeted by a series of protests this summer, adding to the ongoing tension regarding immigration enforcement in the United States.