Connecticut police are urging parents to be cautious after a box of candy was apparently tampered with and then distributed at a local elementary school’s Halloween event this weekend.
It remains unclear if the candy itself was altered in any way, and no one appears to have been harmed.
A fun-size box of Dots that was handed out at the Lewin G. Joel Jr. School’s “Monster Mash” event on Saturday was found to have been opened and sealed shut again, with a large glob of glue, according to the Clinton Police Department.
The candy inside was removed from the package and re-sorted, police said in a statement.
“DOTS candy routinely come in assorted colors in each box,” they said. “This box, once opened by the resident tonight, revealed that all the DOTS inside the box were the same color [red].
“It is unknown if the candy inside the box was also tampered with.”
The candy will be sent to a lab for analysis, Clinton police said, according to the Hartford Courant.
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It was not immediately clear how many people attended the Halloween event, or if authorities believe there is more than one suspicious box of candy. The Joel School has an enrollment of 500 students from Pre-K to third grade, according to its website.
(PEOPLE could not immediately reach a district spokesperson for comment.)
Police encouraged attendees to the event to take extra precautions before allowing their children to eat the treats.
“If you aren’t sure if your candy may have been tampered with, we urge you to error on the side of caution and merely discard the candy,” police said.
With the return of Halloween brings the return of annual concerns about kids receiving altered or dangerous treats. Last year, two children in Fort Worth, Texas, found staples in Reese’s peanut butter cups they received while trick-or-treating.
According to an incident report obtained by PEOPLE, two neighbor parents whose children had not been trick-or-treating together made the discovery. The peanut butter cups containing staples came in packages that were sealed.
Jessica Faris, whose son initially found the staples, told NBC-DFW at the time, “I was in disbelief. You know, you hear about stories like this all the time, but you just think it can’t happen to you.
“When it happens to your child, you just can’t believe it.”