BEND, Ore. -

A Pacific Power circuit breaker tripped with a loud boom at its SE Cleveland Avenue substation Sunday evening, putting almost 3,000 customers in the dark on Bend's south side for three hours.

Deschutes County 911 dispatchers said they received reports of a loud explosion just before 7 p.m, around the time when the circuit breaker locked out, according to utility spokeswoman Jan Mitchell.

The outage affected 2,896 customers, Mitchell said.

There was no immediate word on the cause.

The utility's Oregon outage information page said repairs were under way shortly before 8 p.m., and that it could take until 10 p.m. to restore service to those affected -- and as it turned out, that's when power was restored, officials said.

However, one resident said her power did not come back on until around 1 a.m.