(CNN) — At least two detainees were shot at an US Immigration and Customs Enforcement facility in Dallas on Wednesday morning, according to two law enforcement officials with knowledge of the incident.

A suspect is dead from a self-inflicted gun shot wound, Homeland Security Secretary Kristi Noem said on X .

“Details are still emerging but we can confirm there were multiple injuries and fatalities,” Noem’s post read. The motive in the shooting is unknown, she said.

Acting ICE Director Todd Lyons said on CNN earlier Wednesday three people were shot, all of whom were taken to a hospital. He did not specify who the three people were.

“Preliminary information is a possible sniper,” Lyons said.

ICE employees, civilians, and immigrant detainees are generally among those at the facility

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