A sniper opened fire on the Dallas Immigration and Customs Enforcement field office on Wednesday morning, killing one detainee and critically wounding two other detainees, the Department of Homeland Security said.

The suspect was also linked to a location in Oklahoma. A family member said the 29-year-old wasn’t known to have strong political leanings.

ICE" on an unused bullet, fired on an Immigration and Customs Enforcement field office in Dallas from a nearby rooftop on Wednesday, killing a detainee and badly wounding two others before taking his own life,