By MyFM's Rick Michaels - Police in Holliston are investigating a threatening message that was written on a dry-erase board at the High School, indicating a device was hidden in a specified location. The message was found after school had been dismissed for the day on Tuesday afternoon. No suspicious items were found, but the area was closed off as Holliston Police followed the Massachusetts State Police bomb threat protocols, closing off the area at the High School and conducting a thorough search. No device was found. Holliston Police and School officials, out of an abundance of caution then requested an additional search of the specified area, from the State Police Bomb Squad, assigned to the State Fire Marshall’s Office. Again no suspicious items were discovered and the area was reopened. Holliston Police are now investigating who was responsible and are asking anyone with information to contact the Police Department.