The director of U.S. Immigration and Customs Enforcement says three people have been shot at a Dallas ICE facility and the shooter is dead from a self-inflicted gunshot wound.

Acting ICE Director Todd Lyons confirmed the shooting during an interview on CNN on Wednesday. Lyons said it wasn’t immediately known whether employees, civilians or detainees were shot.

Homeland Security Secretary Kristi Noem says details were still emerging, but the agency was confirming there were “multiple injuries and fatalities” at the field office. Dozens of emergency vehicles were seen along a highway near the facility.

AP video by Jamie Stengle