(CNN) Ohio police are urging trick-or-treaters to carefully sift through their Halloween stash after two people said they found razor blades hidden inside candy wrappers.

One of the people found a blade and cut a finger while sorting through their candy on Halloween night, Colerain Township Police spokesman James Love told CNN. The person went to the hospital for stitches. No one else was injured.

The two people who found the blades had trick-or-treated together in the same neighborhood in the Cincinnati suburb, Sgt. Scott Owen told CNN affiliate WLWT . They're not sure which of the houses handed out the tampered candy.

The blades were hidden inside the wrappers of two candy bars, Love said.

That same night in Waterbury, Connecticut, police arrested a man after razor blades were found in the bottom of two trick-or-treaters' candy bags, CNN affiliate WTIC reported.