A deadly shooting unfolded Tuesday at a U.S. Immigration and Customs Enforcement (ICE) field office in Dallas, Texas, leaving multiple people dead and several others injured, according to Homeland Security Secretary Kristi Noem. Authorities confirmed that the gunman died at the scene from a self-inflicted gunshot wound.

The attack sent shockwaves through the federal facility, which houses hundreds of staff and detainee services. Emergency responders rushed to the scene as law enforcement secured the area and evacuated employees.

While the exact number of casualties has not yet been confirmed, federal and state officials have pledged a full investigation into the motive and circumstances surrounding the shooting. Secretary Noem described the incident as a “devastating tragedy” and vowed that the Department of Homeland Security will provide support to victims and their families.