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A fourth electrical substation was vandalized late on Christmas Day in Washington state, leaving homes in Kapowsin and Graham temporarily without power, according to the Pierce County Sheriff’s Office.
By 7 a.m. Monday, more than 10,500 Puget Sound Energy customers were without electricity across the region, KOMO-TV reported.
The suspects broke into a fenced area and vandalized equipment, causing a fire, officials said. The fire was extinguished and power was later restored, but no suspects are in custody, officials said.
The attacks come as federal officials are warning that the U.S. power grid needs better security to prevent domestic terrorism and after a large outage in North Carolina earlier this month that took days to repair.
