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... People in a quiet neighborhood in Carthage, a town in Moore County, North Carolina, heard a series of six loud pops a few minutes before 8:00 p.m. on Dec. 3, 2022. A resident named Michael Campbell said he ducked at the sound. Another witness told police they thought they were hearing fireworks.

The noise turned out to be someone shooting a rifle at a power substation next door to Campbell's home. The substation, operated by the utility Duke Energy Corp., consists of equipment that converts electricity into different voltages as it's transported to the area and then steered into individual houses.

The shots hit the radiator of an electrical transformer, a sensitive piece of technology whose importance would likely be understood only by utility company employees. It began dumping a "vast amount" of oil, according to police reports. A subsequent investigation has pointed to a local right-wing group, one of a wave of attacks or planned attacks on power infrastructure.

By 8:10 the lights in Carthage went out. Minutes later, a security alarm went off at a Duke Energy substation 10 miles away, this one protected from view by large pine trees. When company personnel responded, they found that someone had shot its transformer radiator, too. Police found shell casings on the ground at the site and noticed someone had slashed the tires on nearby service trucks. ...