NIAGARA FALLS, ONT.—Police are investigating after razor blades were discovered in Halloween candy in southwestern Ontario.

Niagara Regional police say a child in Thorold, Ont., bit into a chocolate bar after returning home and felt something solid within the treat.

They say the child stopped chewing and spit out the bar, which revealed a razor blade that appeared to come from a disposable shaving razor.

In another incident a child bit into an O’Henry! chocolate bar after trick-or-treating in St. Catharines, Ont., and bit into something made of metal, which turned out to be a razor blade.

Police say neither child was hurt and are asking parents to examine candy wrappers for tampering.

They are asking for the public’s help with their investigation.