HALIFAX -- There's been another case of a pin being placed inside a candy bar handed out on Halloween in the Halifax area, bringing the total number of cases to four.

Halifax police say the latest case of tampering with candy was discovered Thursday evening by a parent who took a bite of a small candy bar.

Police say the bar was handed out in the Joseph Howe Drive and Bayers Road area of Halifax.

They are investigating three other complaints of pins being found inside candy bars that were handed out in Dartmouth neighbourhoods.

Investigators are cautioning parents to check their children's candy.