Conway police are investigating threats posted on the Facebook pages of two Grand Strand television stations. No threats were posted on NewsChannel 15's Facebook page.

The posted threatened to blow up Conway High School.

Security sweeps were conducted at the school Sunday night with the use of K-9 units. There were extra police on the school's campus Monday morning as an additional security measure.

Conway police say they're working with Facebook and Horry Telephone to identify the source of the threat.