A pinup calendar video shoot in conservative Utah featuring women riding in tanks and firing weapons while wearing bikinis has sparked an investigation among law enforcement who suspect some of their own equipment was used for the shoot.

The Utah National Guard learned about the video shoot Tuesday and is examining whether military equipment was used in the calendar shoot, according to Lt. Col. Steven Fairbourn. The location of the video shoot was Big Shot Ranch, a private gun club about 35 miles west of Salt Lake City. The club's 68 acres of land near the southern edge of the Great Salt Lake provided the space, employee Nikko Kelaidis said.

The state's National Guard did not give permission for the project, Fairbourn said.

Utah's Department of Public Safety also believes that two officers are even shown in the video, donning agency uniforms, which violates the agency's policies.

The department released a statement Thursday after noticing their officers present on the video footage.

"Wearing department uniforms at an event not sanctioned by DPS, nor portraying the values of our agency is very disappointing," the statement read.

The video was an accompanying "behind the scenes" look at the making of next year's "Hot Shots Calendar," a racy book of British women wearing camouflage bikinis among other tight outfits while striking seductive poses, firing high-powered weapons and riding in military vehicles.

"Productions of this kind are not in keeping with the values of the Utah National Guard nor its members," the National Guard announced in a statement on the calendar.

The production company based out of England that created the video did not comment on the investigation.

According to Fairbourn, the National Guard will likely wrap up its investigation in the next several days.

Public Safety officials are continuing their own internal investigation, the results of which will determine if disciplinary action is necessary.

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