DENVER (CBS4) – An alert has been issued by the FBI to all law enforcement agencies in Colorado and Wyoming involving U.S. military families and concerns about who may be watching them.

The alert says Middle Eastern men are approaching families of U.S. military members at their homes in Colorado and Wyoming. It mentions Greeley, Colorado, and Cheyenne, Wyoming, as the specific areas.

In one case last May the wife of a military member was approached in front of her home by two Middle Eastern males. The men stated that she was the wife of a U.S. interrogator. When she denied their claims the men laughed. The two men left the area in a dark-colored, four-door sedan with two other Middle Eastern males in the vehicle.

“The woman had observed the vehicle in the neighborhood on previous occasions,” the alert states.

Similar incidents in Wyoming have been reported to the FBI throughout June 2015.

“On numerous occasions family members of military personnel were confronted by Middle Eastern males in front of their homes.”

The FBI’s alert says Middle Eastern men attempted to gain personal information about military members and family members through intimidation. Those family members reported feeling scared.

The alert says the men haven’t been identified and the FBI isn’t sure if the incidents all involve the same men.

While the FBI won’t comment on the alert to CBS4, Colorado’s Department of Homeland Security says it is aware of it and says military families are encouraged to report any suspicious behavior to the FBI.

The alert says people in Colorado who are approached should contact the FBI Fort Collins Resident Agency at (970) 663-1028. In Wyoming contact the FBI Cheyenne Resident Agency at (307) 632-6224.