Police in Tennessee have discovered 14 improvised explosive devices in a man's home as they were arresting him, the local sheriff's office said.

Officers were executing a warrant in the home of Kevin Wade O'Neal in Old Fort, about 45 miles (70km) east of Chattanooga, after he had threatened to kill public officials and law enforcement personnel in Polk County.

After arresting the 54-year-old, officers noticed "something smouldering" in the bedroom where he was found.

Image: Kevin Wade O'Neal. Pic: Polk County Sheriff's Office

On closer inspection, they discovered an improvised explosive device and evacuated the house until bomb squad officers arrived at the scene.

Fourteen devices were found inside the property - none of which detonated.

Image: Improvised explosive devices were f

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