The Boston Fire Department reports arson investigators arrested a 16-year-old male student at the exam school around 5 p.m. in connection with three fires over the past three days.
The student, not immediately identified, will be arraigned tomorrow, the day after a third fire sent students and staff into the street again and fire inspectors and police swarmed the school, looking for evidence and witnesses and handing anonymous-tip-line pamphlets to arriving students. The Fire Department said the investigation is continuing.
"We look forward to an uninterrupted day of learning," school Headmaster Lynne Mooney Teta told parents in a robocall tonight. She said that police will maintain a heightened presence at the school tomorrow.