UPDATE (5:25 PM) -- Corn Belt Energy's outage map now indicates power has been fully restored to their customers in Bloomington's 61704 zip code.
BLOOMINGTON (WEEK) -- The cause of power outage that initially left nearly 7,000 Corn Belt Energy customers power was unknown, according to a company spokesperson.
As of 5:15 pm, the outage was concentrated to a single zip code in Bloomington, 61704. The company outage map said 4,144 were in the dark. Spokesperson Hillary Cherry said crews are working to diagnose the problem at one of their substations in the area.