ISTANBUL

The FBI has disclosed new details from handwritten notes found at the residence of the 29-year-old gunman who opened fire on a US Immigration and Customs Enforcement (ICE) facility in Dallas, Texas on Wednesday.

The attack resulted in the death of one detainee and critically injured two others before the shooter, Joshua Jahn, died from a self-inflicted gunshot wound.

According to FBI Director Kash Patel, the agency has been working around the clock to analyze data and process materials seized from Jahn's home. "The FBI is committed to providing timely updates, as promised," Patel said on US social media platform X.

One piece of evidence was a handwritten note recovered from Jahn's bedroom saying: "Hopefully this will give ICE agents real terror, to think, 'is there a sniper with AP (armor-piercing) rounds on that roof?'"

Among the findings, investigators discovered a document titled "Dallas County Office of Homeland Security & Emergency Management," which contained a list of Department of Homeland Security (DHS) facilities.

Additionally, on Tuesday and Wednesday, Jahn did multiple online searches related to ballistics and a video on the fatal Sept. 10 shooting of conservative activist Charlie Kirk.

In August, he also searched for apps that track the presence of ICE agents.

The actions of ICE have come under heavy criticism since US President Donald Trump came to office in January, with immigrant advocates accusing them of carrying out raids in masks and refusing to show IDs, rounding up people seen as Hispanic regardless of their citizenship status, and targeting longtime, law-abiding resident migrants, not the criminals and drug dealers Trump had promised to crack down on.

Multiple cities in the US have seen resistance to ICE and protests, stressing the demonstrations should be nonviolent.