The FBI's Dallas office is seeking 32-year-old Benjamin Hanil Song, a former Marine Corps reservist, in connection to the ambush at the Prairieland Detention Center, according to a wanted poster for Song.

The suspect, a former U.S. Marine Corps reservist, is accused of joining 11 others in an organized attack against officers at the Prairieland Detention Center.

A Blue Alert was issued on Wednesday for a man accused of shooting an Alvarado police officer during an attack at a U.S. Immigration and Customs Enforcement detention facility on July 4, according to the Texas Department of Public Safety and the FBI.