According to the Wake County Sheriff's Department, they received an anonymous letter in the mail Wednesday threatening a Wake County mall and the Raleigh-Durham International Airport.
Investigators are not releasing the details of the threat. As a precaution, local shopping centers, RDU Airport and other law enforcement agencies were notified about the threat.
A spokesperson for the Raleigh Police Department says his department was made aware of the situation. The State Department of Crime Control and Public Safety said it had no knowledge of a threat.
Security officials with the Crabtree Valley Mall, the Triangle Towne Center, North Hills and the Cary Town Center say they are working closely with law enforcement. All of the shopping centers have increased security.
"We take these matters very seriously and we've increased security in light of this," said Sandra Geist, Marketing Director for the Crabtree Valley Mall said. "Our biggest responsibility is the safety of our shoppers and our employees."
Merchants at North Hills received flyers warning them about the potential threat. Store managers tell Eyewitness News they have been told to watch out for suspicious activity.
Meanwhile, Wake County investigators are releasing few details at this time, saying they do not want to panic shoppers and air travelers. However, they say they are taking the threat seriously.