The FBI is now involved in the investigation regarding a series of bomb threats that targeted schools throughout the state.

The Massachusetts State Police say troopers attached to the Commonwealth Fusion Center are assisting the FBI with a coordinated investigation into the source or sources of the threats.

The State Police Bomb Squad, as well as explosive ordinance technicians from other law enforcement agencies, have responded or are currently responding to multiple bomb threats.

A list of the communities targeted on Tuesday so far includes Groton, Weymouth, Taunton, Arlington, Plymouth, Salisbury, Waltham, Ayer, Tewksbury, Newton, Billerica, Swampsott, Boston, Kingston and Westford (Nashoba Valley Tech).

Investigators say some of the bomb threats were made by phone and that some of those phone threats were made through automated calls.

Information about the threats is being compiled by the Commonwealth Fusion Center and it will be shared with police and fire departments across Massachusetts as well other Fusion Centers in the United States.

In addition to Tuesday's threats officials say Falmouth, Bourne, Mashpee, Plymouth, Weymouth, Arlington, and Boston (Boston College High School), received threats on Friday.

State Police say the specific language used in those threats isn't being released at this time.