DALLAS (AP) — What exactly motivated a shooter who authorities say opened fire on a U.S. Immigration and Customs Enforcement facility in Dallas, killing one detainee and wounding two others before taking his own life, remained unclear Thursday.

The man suspected of firing a rifle from a nearby rooftop into a transport van Wednesday was identified as 29-year-old Joshua Jahn by a law enforcement official who could not publicly disclose details of the investigation and spoke to The Associated Press on condition of anonymity.

FBI Director Kash Patel posted a photo on social media showing a bullet found at the scene with “ANTI-ICE” written on it. Homeland Security Secretary Kristi Noem ordered more security at ICE facilities across the U.S., according to a post by the Department of Homeland S

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