UPDATE: Power restored to thousands after several hours

NORFOLK, Neb. -- Friday night, thousands lost power in northeast Nebraska. 

NPPD's Mark Becker told NCN that 8,731 customers lost power, along with two Elkhorn substations and the city of Battle Creek. 

Becker said that the cause of the outage was a failed arrestor, electricity was locked out, and a shield wire crossed a substation causing the transformer to trip. The shield wire sparked a couple fires near the Norfolk Northeast station. 

Becker said that NPPD customers had their power restored in Norfolk at 3:20 a.m., and the city of Battle Creek and the two Elkhorn stations were back at 5:46 a.m.