Payson schools were placed on lockdown Tuesday after a threat was made through a school non-emergency phone number, according to the Payson Police Department. Police said officers were stationed at every campus as a precaution while they investigated whether the threat was credible and who made it. The department did not immediately provide details about the threat or say how long the lockdown would last. The investigation was ongoing as of Tuesday. No further information about any injuries or arrests was provided.