The Somervell County Sheriff's Department said Monday it is investigating a weekend incident in which a driver crashed a vehicle into outer security barriers at the Comanche Peak Nuclear Power Plant and then fled the scene.

The driver later was located and apprehended. The suspect is a male with a local address. His name has not been released pending official filing of several charges, which likely will occur Tuesday, Sheriff Greg Doyle said.

"Alcohol is considered to be a contributing factor" to the incident, he added.

However, the sheriff's office "has ruled out any kind of intention or plan on the part of the driver in relation to this event," Doyle said.

The incident occurred around 12:40 a.m. Saturday morning.

The plant’s on-site security team used "appropriate security measures" to manage the event, Luminant said, although it did not specify what measures its armed security force used.

The plant also took the aggressive step of declaring a notification of an "unusual event," the lowest of four emergency level classifications established by the U.S. Nuclear Regulatory Commission.

Comanche Peak was locked down to ensure security was not breached.

“We are extremely proud of our on-site security team who acted commendably last night,” Rafael Flores, Luminant’s chief nuclear officer, said in a prepared statement. “At this point, our primary focus is on the ongoing investigation, and we are working hand-in-hand with the Somervell County Sheriff’s Office and the NRC as they investigate this matter."

The "unusual event" status was discontinued later Saturday morning and the plant resumed normal operations, Luminant said.

Please continue to check the Reporter online for continuing updates and Wednesday's print edition for a full report.