Building at Palo Verde Nuclear Complex Evacuated After Bomb Threat

A bomb threat prompted officials to evacuate a building at the complex housing America's largest nuclear power plant on Wednesday. Police searched an administrative building outside the protective containment area at the Palo Verde Nuclear Generating Station, which is located west of Phoenix, Arizona. No explosive devices were found and an all-clear was later declared. The plant’s operations were not impacted, authorities said. The facility provides power for around four million people in four states.

The Palo Verde Nuclear generating plant
The Palo Verde Nuclear generating plant, the nation's largest nuclear power plant, is seen between two Saguaro cactus October 19, 2005 in Phoenix, Arizona. The Arizona Public Service Co was forced to shut down Units 2 and 3 on October 11 when the company could not prove to the Nuclear Regulatory Commission that the cooling system in the units would operate correctly in case of an emergency. Units 2 and 3 of the plant are expected to be back online and at full capacity by the end of the week. Unit 1 had previously been shut down for maintenance. Jeff Topping / Getty Images, file
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