MCPHERSON, Kan. (KSNW) — McPherson High School (MHS) was locked down on Tuesday due to a report of a subject with a firearm, according to a Facebook post from McPherson Public Schools.

“As of 2:50 pm, McPherson PD and McPherson County Sheriff’s Dept. have determined that there is no known threat inside or near the vicinity of McPherson High School as of dismissal time,” reads the updated Facebook post.

According to a news release from the McPherson Police Department, the MHS School Resource Officer (SRO) was notified that a student overheard another student say they saw someone outside the high school with a firearm at 1:15 p.m.

The SRO then notified McPherson County Emergency Communications, who notified local law enforcement. MHS was placed on lockdown, and both the McPherson Police Department and McPherson County Sheriffs responded to the school as a result.

“McPherson High School is on lockdown at this time. Police are investigating a potential report. The school is safe but will remain in lockdown. Out of an abundance of caution, all other building are taking appropriate safety measures,” read the Facebook post.

Law enforcement searched the area outside MHS and inside MHS. They did not find anyone with a firearm, but they did stay at the school until students were released and left the area.

“Students will not be allowed to remain on campus. Students remaining for practice for activities will remain inside until given the all clear. Parents of students in activities are welcome to pick up their student or advise them to come home,” reads the Facebook post.

Students at the preschool, elementary school, and middle school were dismissed according to standard procedures at the normal dismissal times.

An investigation is ongoing.

The McPherson Police Department encourages anyone who Sees Something to Say Something and report suspicious or criminal activity of an emergent nature right away by calling 911. If the situation is not an emergency, please call McPherson County Emergency Communications at 620-245-1266 or McPherson County Crime Stoppers at 620-241-1122.