Over the past few years the Islamic State has posted the names of some 15,000 American citizens from places such as New York, Texas, Florida and California on kill lists.

Yet the FBI has not neccessarily notified those on these kill lists that they have been marked for death, according to Circa News.

The lists are not publicly available, but Circa News was able to obtain samples. Out of 24 people on kill lists they contacted in Texas, 22 of them did not know that they were on such a list.

The FBI said they do notify citizens if they are on kill lists but acknowledged it is possible some citizens were accidentally not contacted.

"The FBI routinely notifies individuals and organizations of potential threat information. We perform these notifications so potential victims are aware of possible threats and take appropriate steps,” the bureau said in a statement. “Those measures may include paying close attention to your surroundings at all times, protecting personally identifiable information, and immediately calling the local authorities if you observe something suspicious. The FBI will continue to work closely with federal, state, and local partners to keep the public informed of potential threats.”

They added that to date, no Americans listed on ISIS kill lists published online have been killed.