(Amherst, Mass. )  A Massachusetts high school was closed for the day today after administrators were alerted to a Facebook  post about a student who was possibly bringing a gun to school.Officials at Amherst Regional High School say they closed the school "as a precaution and to facilitate an investigation by police". The building was put off limits to all staff, students, and the public. A meeting has been scheduled at the middle school for parents @ 7PM.