A shooter killed at least one person and wounded others on Wednesday at an Immigration and Customs Enforcement (ICE) field office in Dallas before dying of a self-inflicted gunshot wound, local and federal authorities said.
Police responded to reports of the shooting at the office in northwest Dallas at about 6:40 AM local time (1140 GMT), the Dallas police department said on X.
The suspect opened fire on the office from an adjacent building, according to the preliminary investigation. Two people were transported to a hospital with gunshot wounds, while a third person died at the scene, the police added.
ICE officers were not injured, but it was not clear whether the victims included ICE detainees, local security or local law enforcement, Department of Homeland Security spokeswoman Tricia McLaughlin said in an interview on Fox News' "Fox & Friends."
Investigators are looking at the possibility the shot came from the rooftop of a nearby apartment building, McLaughlin said.
"Those details are still murky. It looked like it might have been a sniper or some sort of a long-form shot,” McLaughlin added.
She also said the shooting took place at an ICE field office, not a detention facility, where ICE officers conduct short-term processing of recently-arrested detainees.
The victims were being led into the building to be processed and repatriated, Fox News reported, citing Dallas police department sources.
The shooter was found dead on the roof of a nearby building, local ABC affiliate WFAA reported, citing sources.

One dead, 11 people missing after mudslide in China's Jiangxi province
Philippine VP Duterte posts bail after arrest order for alleged grave threats
Lindsay Clancy trial over killing her children ends in mistrial
Israel says it strikes southern Lebanon after Hezbollah drone launch
Sydney sweats in spring hot spell, faces 'extreme' bushfire risk
Nine days after disaster, two pulled alive from Nepal hydropower tunnel
Germany launches manhunt after spate of sabotage attacks on power grid
Air India sack Phuket-Delhi pilot who failed drug test
