Are Anti-LGBTQ+ Extremists Behind Attacks on Power Grids?

(CNN) -- After thousands of customers in Pierce County, Washington, were affected Sunday when burglars vandalized three energy substations, power was then knocked out for even more homes after a suspect or suspects gained access to a fourth substation, vandalizing the equipment and causing a fire, according to an update from the Pierce County Sheriff's Department.

The damaged equipment cut power to around 14,000 customers, police said, weeks after an attack in North Carolina left thousands in the dark for days amid federal warnings of extremist threats to electricity infrastructure.

The Christmas Day vandalism near Tacoma marked more such incidents in the state, where two November attacks on Puget Sound Energy substations were investigated by the FBI. Vandalism and deliberate damage were reported last month at substations in southern Washington and Oregon.

No suspects are in custody in the latest case affecting Puyallup and Graham, Washington, and it "is unknown if there are any motives or if this was a coordinated attack on the power systems," the Pierce County Sheriff's Department said Sunday in a statement.

The FBI's Seattle Division was aware of the vandalism reports but would not confirm or deny its role in any investigation, adding, "We do take threats against our infrastructure seriously and urge anyone with information to contact law enforcement," it told CNN on Sunday.

The bureau in a November 22 bulletin warned of reports of threats to electricity infrastructure by people espousing racially or ethnically motivated extremist ideology "to create civil disorder and inspire further violence," according to the alert sent to private industry.

Nothing taken in holiday incidents

The first report of a burglary at a Tacoma Public Utilities substation came at 5:26 a.m. PT, the sheriff's office said.

"Deputies arrived on scene and saw there was forced entry into the fenced area," according to its statement. "Nothing had been taken from the substation, but the suspect vandalized the equipment causing a power outage in the area."

Then, a second burglary was reported at another Tacoma Public Utilities substation, with forced entry and damage to equipment, the statement said. Similarly, nothing was taken.

"At 11:25 we were notified by Puget Sound Energy that they too had a power outage this morning at 02:39 a.m. Deputies are currently on scene at this facility where the fenced area was broken into and the equipment vandalized," the statement continued.

Dispatchers received a call about a fire at another substation at 7:21 p.m. local time Sunday, the sheriff's department said. Firefighters and Puget Sound Energy employees responded to the scene and were able to extinguish the fire and secure and the substation.

Power has since been restored to most of the affected homes, the update said.

Power grid threats have risen

Anti-government groups over the past two years have used online forums to urge followers to attack critical infrastructure, including the power grid. They have posted documents and even instructions outlining vulnerabilities and suggesting the use of high-powered rifles.

Investigators probing the attacks last month at substations in Moore County, North Carolina, zeroed in on two possible threads: extremists' writings in online forums encouraging attacks on critical infrastructure, and recent disruptions of LGBTQ+ events across the nation by domestic extremists, law enforcement sources told CNN.

The attackers "knew exactly what they were doing," Moore County Sheriff Ronnie Fields said at the time.

The resulting outages left some 40,000 customers scrambling as temperatures dipped to the mid-40s, with schools and businesses forced to close for days before power was restored.

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