A shooter opened fire on a U.S. Immigration and Customs Enforcement facility in Dallas, Texas, on Wednesday, killing one detainee and critically wounding two others in what authorities are investigating as an "act of targeted violence."

Officials say the shooter fired "indiscriminately" from a nearby rooftop, striking the immigration facility and a van in the sallyport, where the victims were hit. The gunman was found dead at the scene from a self-inflicted gunshot wound, authorities said.

The Department of Homeland Security initially said two detainees were killed and one was critically injured. The agency updated its statement but did not explain the revised death toll.

The shooting is being investigated as a targeted attack on law enforcement, authorities said, though no agents were hit by gunfire. FBI Director Kash Patel said there was evidence of an "ideological motive" at the scene and posted an image on X showing an unspent shell casing inscribed with the words "ANTI-ICE" in blue writing.