(AP) — One small rodent is getting the blame for a massive power outage in southern and eastern sections of Wichita.

Nearly 10,000 customers of Westar Energy were affected by the outage Monday afternoon.

Authorities say a squirrel crawled into equipment at a substation, causing a transformer to blow out. A fire then broke out at the substation. Firefighters were quickly able to bring it under control.

Power was restored to the Westar customers in about one hour.