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Officials in Dallas are expected to hold a news conference with the latest on Wednesday morning’s shooting at about 1:30 p.m. CT. The press conference will appear in the video player at the top of this page.

FBI Director Kash Patel released a statement Thursday regarding data and writings found in the home of the suspect involved in the shooting at a U.S. Immigration and Customs Enforcement facility in Dallas, where a detainee was killed and two others were critically wounded by a gunman who then fatally shot himself.

Shortly after 9 a.m. on Thursday, Patel posted a statement on X, formerly known as Twitter, saying that the FBI has “been working 24/7 to seize devices, exploit data, and process writings obtained on location and in the subject’s person/residence/bedroom.”

According to Patel’s post, the suspect, identified as 29-year-old Joshua Jahn, downloaded a document titled “Dallas County Office of Homeland Security & Emergency Management,” which contained a list of DHS facilities.

Jahn also conducted multiple searches of ballistics and the “Charlie Kirk Shot Video” between Sept. 23 and Sept. 24, Patel’s post said. Jahn also allegedly searched for apps that tracked the presence of ICE agents between Aug. 19 and Aug. 24.

Patel’s post stated that one of the handwritten notes recovered read, “Hopefully this will give ICE agents real terror, to think, ‘is there a sniper with AP rounds on that roof?”

Additional evidence found in Jahn’s residence indicated a high degree of pre-attack planning, Patel said.

Patel’s announcement comes one day after Wednesday’s fatal shooting, during which Jahn allegedly began firing “indiscriminately at the ICE building, including at a van in the sallyport,” the Department of Homeland Security said in a statement.

The ICE facility is located along Interstate 35 East, just southwest of Dallas Love Field, northwest of downtown.

Three detainees who were inside the van when the shooting began were hit. One was killed and two remain hospitalized in critical condition. Officials said that as many as 10 other detainees in the van were not hurt. No ICE personnel were injured during the shooting.

In the hours following the shooting, Patel posted a photo on social media showing a bullet found at the scene with “ANTI-ICE” written on it. Homeland Security Secretary Kristi Noem ordered more security at ICE facilities across the U.S., according to a post by the DHS on the social platform X.

Wednesday’s attack was the latest high-profile targeted killing in the U.S., coming two weeks after conservative activist Charlie Kirk was killed by a shooter on the roof of a building at Utah Valley University, and as heightened immigration enforcement has prompted backlash against ICE agents and fear in immigrant communities.