Luminant said Monday it is working closely with local law enforcement authorities as they investigate a suspect who was apprehended after crashing his vehicle into outer security barriers early Saturday morning at the Comanche Peak Nuclear Power Plant.

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 security people used.

The plant then said it 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.

The plant also 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 dropped 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.