MORRISVILLE — Progress Energy said almost 10,000 customers in Morrisville and Cary were affected when power went out about 6:30 a.m. Wednesday.

Police in Morrisville and Cary dispatched officers to direct traffic at numerous intersections Wednesday morning because of power outages that disabled traffic signals for about an hour.

About 25 customers remained without power at 8 a.m.

Morrisville police also said a downed power line prevented residents of the Crabtree Crossing apartments from leaving their complex on Walnut Forest Road, near Chapel Hill Road.

Police said there apparently had been problems at Progress Energy substations in Apex, Cary and Morrisville earlier in the morning.

It was not known if a transformer fire in Morrisville was related to the outage, police said.