Sudbury police said they are investigating the origin of a suspicious device found Thursday afternoon on Thompson Drive near Lincoln-Sudbury High School.
Public safety officials received a call at about 4:17 p.m. from a Thompson Drive resident who said the device had been found in the road and moved next to the resident's mail box, according to a statement from Sudbury police.
"Responding units examined the device to the extent possible determining there was a credible threat," the statement said. "In light of their observations a perimeter was established at a safe distance and Thompson Drive was shut down to vehicular and pedestrian traffic for the safety of all."
The State Police Explosives Unit came to the scene and determined the device was "no longer a threat."
"It is not completely clear what the intent of the device was but appears to be some sort of infernal device," the police statement said. Numerous searches were made of the area, including the perimeter of the high school, but no other devices were found.
"The incident remains under investigation as to the origin of the device and whether there was a specific target," police said. "Although we do not feel anyone was specifically targeted at this point, we are considering all possibilities as the investigation progresses."
Police reminded residents to contact authorities immediately if they find any suspicious objects or packages, and not to handle them. They also asked anyone who has seen any suspicious activity to contact the department.
"At this point, the circumstances appear to be an isolated incident but if further information is developed we will update everyone accordingly," the statement said.
Officials at Lincoln-Sudbury High sent an email to families today notifying them of the incident.
"Throughout the evening as well this morning, school staff have completed multiple property checks, both inside and outside the building, and nothing unusual has been found," the email said. "A police investigation is ongoing, and we at the school will continue to be observant. If you see anything unusual or hear information pertinent to this incident, please contact a Housemaster."