The Islamic State fighters have dispersed in the United States.
"We have 71 trained soldiers in 15 different states ready at our word to attack any target we desire," the extremists claimed on Tuesday.
The states stuffed with the ISIS soldiers include Virginia, Maryland, Illinois, California and Michigan.
23 jihadists have already signed up for attacks. The first one was carried out by ISIS on the Prophet Muhammad cartoon exhibition in Garland, Texas on Sunday.
The militant group also said that its aim was the exhibition's organizer and controversial US blogger Pamela Geller.
"We will send all our Lions to achieve her slaughter," Islamic State said.
On Tuesday, IS declared on its official radio that the attack on the cartoon exhibition was conducted by its fighters in protest of slander against the Prophet.