"We saw other crimes were imminent," said Butch Browning, the Louisiana Fire Marshal.
Mark Anthony Conditt, a 23-year-old white male from Pflugerville, Texas, law enforcement sources told the Associated Press.
Julia Poff allegedly mailed three explosive devices to the former president, the Texas governor, and the Social Security Administration.
"I've been waiting for you here all this time," Liu Yongbiao reportedly told the arresting officers.
The 24-year-old was killed while plotting a suicide bomb attack, according to police.