Buses have arrived at the Plymouth-Canton Educational Park and so has the 's bomb squad.
Canton Police Sgt. Mark Gajesski said the bomb squad is on scene "as a precautionary measure."
It's the second time this week police have responded to a call for help from the three-school campus, which includes , and high schools. On Monday, after a threatening note was discovered in Salem High by a teacher.
Students are being kept in their classrooms in what is called a partial lockdown by school officials. They are in their first-hour classes. District spokesman Frank Ruggirello Jr said that police are in charge of the scene and the district will communicate with parents as soon as possible but at this point, there is nothing more to tell.
Buses have arrived at the school, but Ruggirello said no decision has been made at this point about whether classes will be dismissed early or not.
Meanwhile, parents are talking about today's incident on Canton Patch's Facebook page.
Heidi Nicholas wrote, "Those poor kids and parents must be sick with worry. What the heck is wrong with people, making threats like this? Makes me glad mine are all in elementary."
"Both of my kids go to Salem," Carol Micallef wrote, "I am glad that the district takes any type of threat seriously."
Heather Watkins-Foster wrote that, as a parent of a student at Plymouth, "I would like to say that there are far too many students in one spot. This crap needs to stop! I'm worried to death about my child."
Other parents reported that tensions were high among students at the schools.
Ruggirello said the district takes every threat "as very serious."