The notes suggest that the Dallas shooter has targeted with ice but accidentally struck the prisoners

Notes written by the person suspected of opening fires on an immigration establishment in Texas indicate that he was targeting ice agents and did not intend to harm the detainees, American lawyer for the North Texas district, Nancy Larson.

An inmate was killed and two others injured critically after an alleged sniper opened fire in an immigration and customs application center (ICE) in Dallas on Wednesday, officials announced.

Speaking at the press conference Thursday, Ms. Larson identified the shooter like Joshua Jahn, 29, adding notes he had written at his home.

She said that he intended to “maxon lethality against ice personnel and to maximum material damage in the establishment”.

“He hoped to minimize collateral damage or injuries to prisoners and any other innocent,” she added.

“It seems that he did not intend to kill the detainees or to harm them. He clearly emerged from these notes that he targeted ice agents and ice staff.”

The victims have not yet been identified.

FBI director Kash Patel, said in an article on social networks earlier than evidence “at this point indicate a high degree of planning before attacks”.

Patel said one of the handwritten notes found: “Hopefully this will give ice agents a real terror, to think:” Is there a sniper with turns on this roof? “”

At the press conference on Thursday, Larson said that the shooter “was most likely acting alone”.

“That morning, the shots sprayed the length of the building, windows and vans of application of the law which were in the Sallyport region,” she said, adding that the detainees were affected.

The notes were found at the shooter’s residence and included a “attack match plan,” she said.

The alleged shooter described the ICE employees as “people who arise to perceive a dirty pay check” according to Ms. Larson.

She said that the shooter had hoped that his actions “would terrorize the ICE employees and interfere with their work”.

“What he did is the very definition of terrorism,” she added.

No evidence was found to join a specific group, and the shooter has mentioned any specific government agency other than ice, she said, but the man expressed his hatred of the federal government.

She also praised the ice and other federal agents who, she said, worked under fire to remove the detainees from the vans and put them in safety.

FBI’s special agent Joe Rothrock said it was a “targeted ambuse attack on the police.”

The shooter “had specifically intended to kill ice agents” and shot transport vehicles with ice, federal and prisoner, he said.

“Jahn also recognized the potential of victims. He knew that high-probability ice prisoners would be transported that morning to the exact place he was confronted with his perch on a neighboring roof,” he said.

Marcos Charles, director of the ICE office on the field of application and dismissal operations, said that the “violent rhetoric” against the ice should stop.

“Contrary to those who demonize our men and women, yesterday, our brave officers returned to danger,” he said, alongside other federal agents, “to save the detainees while shots were still fired.”