JAY – Education was disrupted for the third time in six weeks in connection with a bomb threat after another message, this time written on a school wall, was found Thursday at Jay High School, police Chief Larry White said.

White said police received a call from Superintendent Robert Wall’s office at 10:59 a.m. reporting the bomb threat.

High school students were evacuated to the middle school and dismissed from there earlier than regular release time, White said.

Police and firefighters scanned an area of the first floor that was under concentration and found no sign of a bomb, White said.

The chief said he made the decision to bring in Maine State Police dogs trained in bomb detection. The dogs searched the building and found no bomb, he said. That search ended about 3 p.m., he said.

Wall said the high school and middle school were closed to afternoon and evening activities, and will reopen Friday morning.

The school committee’s Thursday night meeting was moved to the Jay Elementary School, Wall said.

Using school video records, “We were able to develop a list of students” who used that wing during morning hours, White said.

High school staff helped come up with a a the list of students seen coming and going during class time, White said.

Detective Drew Hufnagel was interviewing students Thursday afternoon and has developed “significant leads,” White said.

Officers assisting Hufnagel were Sgt. Troy Young, Russell Adams and White.

Bomb threats at the high school on Jan. 25 and Feb. 12 were written on graphing calculators. A 17-year-old boy was charged with terrorizing in connection with the January threat and a 15-year-old boy was charged with terrorizing in connection with the February threat.

Both students faced school disciplinary measures as well.

The student found responsible for the latest threat will also face criminal and school discipline, officials said.

“What we’re looking at is having a safe environment for students,” Wall said, and “we’re going to err on the side of caution.”