UPDATE: 1 a.m. Monday: Power restored to 2,400 TEP customers on the southeast side of Tucson.
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Tucson Electric Power is investigating a power outage on southeast side of Tucson.
Buildings immediately south of Irvington and east of Houghton are without power. Currently 2,400 customers are without power.
TEP estimates power to be restored at 8:30 p.m.
