PHILADELPHIA (WPVI) -- An underground transformer fire knocked out power to part of Center City Philadelphia early Tuesday morning.
The fire was first noticed beneath the intersection of 21st and Walnut streets around 5:30 a.m.
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PECO and fire crews responded to the scene.
Traffic is being detoured from the area while repairs are underway.
The fire has resulted in approximately 1,200 customers to lose power.
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There are no reports of any injuries.