A squirrel is to blame for a power outage affecting about 4,000 customers in north Ann Arbor and Ann Arbor Township, DTE Energy spokesman Scott Simons said.

The squirrel got into a substation on Dhu Varren Road in Ann Arbor Township about 10 a.m. today, knocking out two circuits, Simons said.

Workers expect to have the power restored in about 30 minutes, Simons said about 12:10 p.m.

The outage area stretches along Nixon Road from Green Road to north of Pontiac Trail. A smaller area of customers to the east and north of North Main Street is also affected.

Simons said it's likely the squirrel died.