Sources familiar with the investigation into the Dallas immigration facility shooting identified Wednesday’s alleged attacker as Joshua Jahn, 29.

The gunman killed one person and injured two others after opening fire on a U.S. Immigration and Customs Enforcement (ICE) facility from a nearby building before taking his own life, police say.

Jahn struck three detainees in an unmarked transport van before killing himself around 7 a.m., according to the sources. He was found dead with a rifle on a nearby rooftop, authorities said.

A photo posted on X by FBI Director Kash Patel showed what appeared to be rifle-caliber ammunition affixed to a clip. The rounds were engraved with an “anti-ICE” message.

The FBI released an image showing a magazine of rounds that features anti-ICE messaging following a shooting at an ICE facility in Dallas, Texas on Wednesday, September 24, 2025. (FBI)

“The attack on ICE in Dallas is yet another despicable assault on law and order,” he said. “The epidemic of leftist political violence must end. Democrats have fostered an environment of evil, emboldening radicals to kill, steal, and destroy. But we will never surrender.”

Texas Gov. Greg Abbott said his state supports immigration enforcement officers and that the shooter’s actions “will NOT slow our arrest, detention, & deportation of illegal immigrants. We will work with ICE & the Dallas Police Department to get to the bottom of the assassin’s motive.”

Vice President JD Vance called for an end to “obsessive attacks” on law enforcement, particularly ICE.

Law enforcement gather at a staging area close to a U.S. Immigration and Customs Enforcement office after a reported shooting, in Dallas on Wednesday, Sept. 24, 2025. (AP Photo/Julio Cortez)

“These horrendous killings must serve as a wake-up call to the far left that their rhetoric about ICE has consequences,” Homeland Security Secretary Kristi Noem wrote on X, while chiding elected officials who demonize immigration authorities. 

“Comparing ICE day in and day out to the Nazi Gestapo, the Secret Police, and slave patrols has consequences,” she added. “The men and women of ICE are fathers and mothers, sons and daughters. They get up every morning to try and make our communities safer. Like everyone else, they just want to go home to their families at night.”