WHAT TO KNOW

* Two people detained in ICE custody were killed in a shooting at an ICE facility in Dallas on Wednesday morning, authorities confirmed to NBC News. A third is in critical condition. * Three detainees were shot when a person “fired indiscriminately” at an ICE building and a van in the sallyport, the Department of Homeland Security says. * The shooter opened fire from the roof or elevated position of an adjacent building, according to an ICE spokesperson. * Several senior law enforcement officials briefed on the investigation have identified the suspected gunman as 29-year-old Joshua Jahn. * The suspected shooter died from a self-inflicted gunshot wound, according to Homeland Security Secretary Kristi Noem. A motive was not initially clear, she said.

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