KEY WEST, Fla. – Detectives are investigating after hidden cameras were found in women's restrooms at three Florida Keys locations.

Monroe County Sheriff's Office spokeswoman Becky Herrin said the miniature cameras were hidden in coat hooks that were found mounted on the walls in women's restrooms. She said they were found at Anne's Beach on Thursday, a Circle K convenience store on U.S. Highway 1 on Saturday and at Harry Harris Park in Tavernier on Tuesday.

Herrin said the coat hooks at all three locations are identical to devices available for purchase on the internet, sold by various companies as home security devices. She said the hooks had small holes on top of them.

"Anyone who has a public restroom on their property needs to check them closely," Sheriff Rick Ramsay said. "If you find anything suspicious you think might contain a hidden camera, don't touch it. Call us right away and we will respond."

Herrin said the cameras used motion detection to take video.

Detectives have warned county and city officials to check their public restrooms.

"Keep in mind, though, that these are very small cameras that can be mounted in many locations and hidden in many seemingly everyday items," Ramsay said.