At least one person has been killed and two injured in a shooting incident at an Immigration and US Customs Enforcement (ICE) office in Dallas, and the shooter has been pronounced dead from a self-inflicted gunshot wound, according to authorities.Local officials responded to a call shortly before 7 a.m. at 8101 North Stemmons Freeway in Dallas, off Interstate 35E.Sources told WFAA that police were originally searching for a possible sniper or multiple shooters, but it remains unclear if there were any other shooters involved.All three people shot were detainees at the facility, and no ICE agents were injured.The shooter fired multiple rounds from a roof or an elevated position down into the field office’s sally port, an ICE spokesperson confirmed.It has been confirmed that a shooter was found dead on the roof of a nearby building.“I can confirm at this time that the FBI is investigating this incident as an act of targeted violence,” said Special Agent in Charge Joe Rothrock during a press conference Wednesday.“Early evidence that we’ve seen from rounds that were found near the suspected shooter contain messages that are anti-ICE in nature,” he said.FBI Director Kash Patel confirmed this on X saying: "While the investigation is ongoing, an initial review of the evidence shows an idealogical motive behind this attack. "One of the unspent shell casings recovered was engraved with the phrase “ANTI ICE.” More updates will be forthcoming.".Trump deploys 700 Marines to Los Angeles as ICE protests continue.It is not clear what the shooter's target was as of yet.Only the detainees were hit, and the spokesperson said it remains unclear whether the shooter was targeting them.Rothrock said officials will not be confirming the identities of the victims at the moment.Dallas mayor Eric Johnson pleaded with the public for restraint and patience. "Let’s be patient, let’s remain calm, and let’s let our law enforcement partners, our police department, do their job," Johnson said."This is an active investigation... There are still a lot of unanswered question."The ICE building where Wednesday's shooting happened had recently received a bomb threat, Department of Homeland Security (DHS) spokesperson Tricia McLaughlin said on Fox News.Texas Gov. Greg Abbott responded to the shooting on X, stating that Texas "fully supports ICE.""This assassination will NOT slow our arrest, detention, & deportation of illegal immigrants," Abbott added without further context."We will work with ICE & the Dallas Police Dept. to get to the bottom of the assassin’s motive.US Vice President JD Vance posted a statement on social media Wednesday morning saying, “The obsessive attack on law enforcement, particularly ICE, must stop. I’m praying for everyone hurt in this attack and for their families.”