As the threat of an active shooter sent the Florida State University campus into lockdown Thursday afternoon, panic and confusion spread far beyond school grounds — especially for the students sheltering in place and the parents desperately trying to reach them.

"An active shooter has been reported in the area of Student Union. Police are on the scene or on the way, Continue to seek shelter and await further instructions. Lock and stay away from all doors and windows and be prepared to take additional protective measures," the text message alert reads.

At least two people were killed and six others were injured in a shooting at Florida State University in Tallahassee on Thursday, authorities said.