Full restoration was completed by 2:30 p.m. Thursday.

Update at 4:58 p.m. Thursday with news of power restoration.

For more than an hour Thursday afternoon, traffic was snarled in Plano due to a power outage impacting a number of intersections.

Around 6,500 people also initially lost power, Oncor said, as of 2:30 p.m. all power was restored to customers.

The cause of the outage was not known.

The city had considered bringing in generators to help the affected traffic lights.

The area of Plano experienced the outage stretched from Park Boulevard north to W Parker Road, and from 75 west to Roundrock Trail, police say.