(KLZA)-- Nebraska Public Power District officials are investigating the cause of a false activation of several warning sirens in the vicinity of the Cooper Nuclear Station near Brownville Tuesday morning.

According to an NPPD release a problem with the Alert and Notification System occurred at approximately 8:16 A.M.

The false system alarm activated several sirens near the plant. There were no problems at the plant that would have required activation of the sirens, and at no time was there a threat to the residents of the area around the Cooper Nuclear Plant.