Investigators are using a remote-controlled device to search bodies of water near the home of Gannon Stauch, an 11-year-old boy who has been missing for more than a week, authorities said Thursday.

The “submersible remotely operated vehicle with sonar” will be used to look for any clues in the investigation, said El Paso County Sheriff’s Office spokeswoman Sgt. Deborah Mynatt. She declined to say what bodies of water, but Big Johnson Reservoir is in the area.

Mynatt said there were no new leads that caused the Sheriff’s Office to use the device, which was provided by Colorado Parks and Wildlife. The added tool will ensure “an even and thorough” investigation, she said.

Divers are not searching the water, she said.

Meanwhile, 52 volunteers, four horse-mounted deputies and two dog teams combed the area near Powers Boulevard and Bradley Road.

Gannon was last seen Jan. 27 by his stepmother, Letecia Stauch, who told investigators the boy was headed to a friend’s house and didn’t return home. Since his disappearance, the Sheriff’s Office has devoted 2,500 hours of manpower searching for him, according to a news release this week.

Anyone with information is asked to call the tipline at 520-6666.