Principal knocked unconscious, allegedly by student, and another staffer attacked in Boston school

A school in Boston's Dorchester neighborhood will be closed Thursday after a principal and another staff member were attacked, allegedly by a student, during dismissal on Wednesday, CBS Boston reports.

Henderson Upper Campus Principal Patricia Lampron was taken to a hospital after being assaulted, authorities said.

When Boston police arrived, they found her unconscious, on the ground, being tended to by staff members.