A makeshift bomb exploded at a Nogales, Ariz., power plant Wednesday morning, damaging a large fuel tank and prompting an investigation by the FBI and federal bomb experts.
Local officials were alerted at 9:30 a.m. to “suspicious activity” at UniSource Energy Services’ Valencia Plant. The explosion damaged a diesel storage tank, but there were no reports of injuries and authorities said they knew of no suspects or witnesses.
Officials closed off the power plant and an adjacent car dealership on North Grand Avenue. The FBI, the federal Bureau of Alcohol, Tobacco, Firearms and Explosives and the Arizona Department of Public Safety were called.
Wednesday evening, agents were still processing the scene. Arizona Corporation Commission spokeswoman Rebecca Wilder said there were no power disruptions and the plant received only minor damage.