According to the Kennebec Journal,

The Kennebec County Sheriff’s office is investigating a weekend threat to “shoot up the school” made in a chatroom with students from Maranacook High School.

Kennebec County Sheriff’s Lt. Chris Read issued a press release Monday morning saying his office “is investigating a vague threat that was made to students.”

Over the weekend some students from the school were in an online chat when someone let someone new in. That person apparently made threats to 'shoot up the school'.

We will keep this story updated as information becomes available.