EAST GRAND FORKS, Minn.-Police now think birds may be the reason two human fingers were found at a campground in East Grand Forks earlier this year.

Officers are exploring if the fingers belonged to a man who was involved in a fireworks accident in Grand Forks a few months ago, and the possibility of a bird bringing them to the campsite.

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Police are in the process of collecting a DNA sample from that man after a national search of fingerprints on file turned up no matches.

The fingers were found just before Memorial Day. Police have searched the river and used a cadaver dog in and around the Red River to no avail.