AUBURN – Central Maine Community College is offering a $10,000 reward for information leading to the prosecution of the person responsible for a bomb threat written on the wall of a bathroom stall Thursday morning.

All campus buildings were evacuated and day classes were canceled.

By 2:30 p.m., the campus had been cleared. It was reopened at 4:30 p.m. and evening classes were in session, said Roger Philippon, dean of planning and public affairs at the college.

It was the second threat involving messages scrawled on a bathroom wall this year.

State police with bomb-sniffing dogs swept the buildings, Philippon said. Nothing was found. Meanwhile, drying ink was left untended in the graphic arts department, and food was abandoned in the cafeteria. It all amounted to a mess and an expense, he said.

“It puts a dent in anyone’s operating budget when you have an incident like this,” Auburn Deputy Police Chief Jason Moen said.

At the time of the bomb threat, the college was hosting a job fair attended by hundreds of high school students and others.

“It was a very good attendance,” Philippon said. “That’s what really makes this particularly upsetting.”

He wasn’t sure whether the job fair will be rescheduled.

Auburn police and firefighters were called to CMCC between 11 and 11:30 a.m. Thursday when someone discovered the threat.

On Feb. 19, classes were canceled at the school after a bomb threat was discovered scribbled on a bathroom wall.

According to that written message, a bomb was set to detonate at 4:30 p.m. that afternoon. The school was evacuated and students sent home for the day. School security teams searched the building and found nothing.

“This one was very similar to the last one,” Moen said.

No suspect was found in the earlier incident. The investigation into both continued on Thursday. Anyone with information is asked to call Auburn police Detective Jason Moore.