The lights are back on for about 4,200 residents and businesses in south Reno, after a power outage Monday morning.

NVEnergy spokesman Karl Walquist says power has been restored to the Donner Springs Subdivision, after being out for an hour.

NVEnergy officials don't know the cause of the outage, but are investigating.

Stoplights at the intersection of McCarran and Rio Poco Drive had been out, but are working again.