(The Hill) – Federal and local authorities are still working to determine a motive after a gunman opened fire on an Immigrations and Customs Enforcement (ICE) facility in Dallas on Wednesday.

One detainee was killed and two others were critically injured in the incident. The suspected shooter, identified as 29-year-old Joshua Jahn, died by a self-inflicted gunshot wound.

The gunman, according to authorities, positioned himself on a rooftop near the ICE field office, not far from the Dallas-Fort Worth International Airport. He fired on the sally port as officials were loading a van with detainees. No officers or staff were injured.

At least one unused bullet recovered by federal investigators was allegedly inscribed with the words “ANTI-ICE.”

FBI Director Kash Patel on Wednesday said th

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