(NewsNation) — Officials with the Department of Homeland Security say the agency will immediately increase security at Immigration and Customs Enforcement facilities across the U.S. following Wednesday’s shooting at an ICE field office in Dallas.

A gunman killed one migrant detainee and seriously wounded two others during what DHS Assistant Secretary Tricia McLaughlin called an attack "motivated by hatred for ICE."

McLaughlin said the Texas incident is the latest in a string of “unprecedented acts of violence against ICE law enforcement,” which has included bomb threats, assaults and the online doxing of officers and their families.

“Our ICE officers are facing a more than 1,000% increase in assaults against them,” McLaughlin said in a prepared statement. “For months, we’ve been warning

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