The Department of Homeland Security corrected its earlier account of a shooting at a U.S. Immigration and Customs Enforcement facility in Dallas, now saying one detainee was killed and two others remain in critical condition.

The agency initially reported two detainees had been killed and another wounded.

No officers were injured in the shooting, but Homeland Security Secretary Kristi Noem insisted the shooting was an "attack on ICE law enforcement."

"This vile attack was motivated by hatred for ICE,” said Noem. “For months, we’ve been warning politicians and the media to tone down their rhetoric about ICE law enforcement before someone was killed."

In an interview with ABC News, ICE Acting Director Todd Lyons described the gunman as a sniper who took an ‘elevated position’ and fired i

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