Authorities are searching for Song in connection with an attack outside a U.S. Immigrations and Customs Enforcement detention facility in Texas on July 4.

The suspect wanted in a recent ambush on an ICE facility is a long-time Antifa member, connected to several left-wing militant groups.

The FBI and Texas DPS are asking for the public's help in the search for Benjamin Song, accused of shooting an officer in the Alvarado ICE attack.