SALINA, Kan. -

A Salina student has been arrested in connection to leaving a handwritten, threatening note at a high school.

Administrators at Salina Central notified police after finding a note in the second floor men's bathroom Wednesday. The note indicated an explosive device was placed inside the high school, as well as Salina South high school.

Police said the 15-year-old student said he found the note in the bathroom, but through the course of the investigation, detectives determined he was the suspect.

The schools were not evacuated. Police said they determined there was no danger to the district.

Investigators said they do not believe the student is connected to similar cases over the past several weeks. He is expected to be charged with making a criminal threat.

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Salina Police are investigating after a new threat was made to the school district.

Jennifer Bradford-Vernon, USD 305 spokeswoman, said a note was found at Salina Central high school Wednesday morning. The note indicated a threatening message involving a situation at Central high school and Salina South high school.

Police investigated the note and found there was no danger to students or staff, Bradford-Vernon said. Parents were notified by email and phone message alerts.

Capt. Mike Sweeney, Salina Police, said a student from Salina Central was in custody in connection to the threat.

It is unknown if this incident is related to two others in the past month.