Ottawa police are investigating after a 10-year-old child found a sewing needle in a Snickers bar, a treat received during Halloween trick-or-treating.

Police say the needle was discovered after the child bit into the small chocolate bar on Saturday evening. The 10-year-old wasn't injured.

The candy bar was collected from the Thistledown area of Barrhaven on Halloween. Police found no other tampered pieces of candy.

This comes during a week that featured several cases of tampered food.

Tampered candy investigated in northern Ontario

On Thursday, police in Sault Ste. Marie, Ont., and North Bay, Ont., said they were investigating separate cases of tampered candy, including a sewing needle and a razor blade found in two different chocolate bars.

North Bay police received two complaints about Halloween candy that had been tampered with, including this mini chocolate bar. (North Bay police)

On Friday, police also reported an Ottawa resident found a sewing needle in a potato as he was peeling it.

The Ottawa cases are not believed to be linked to similar cases in Atlantic Canada.

Earlier this fall, seven needles were discovered in potatoes sold in stores throughout Atlantic Canada, as well as in a number of potatoes processed at the Cavendish Farms French fry plant in New Annan, P.E.I.