BAGLEY VALLEY (CBS13) — A possibly more than century-old blasting cap injured a person in Alpine County last week, authorities say.

The incident happened on Thursday. The Alpine County Sheriff’s Office says they were alerted by the neighboring Douglas County Sheriff’s Office that day about a person who had shown up at an emergency room in Gardnerville.

READ MORE: Father, Son Being Held On $1M Bail For Allegedly Starting Caldor Fire

Apparently, that person had picked up an explosive device somewhere in Bagley Valley. The device eventually exploded and caused the person a significant hand injury.

READ MORE: Rain, Snow, Freezing Temperatures On Deck For Northern California

Deputies soon responded to the area where the person found the explosive to investigate. At the scene, several old blasting caps were discovered.

Authorities believe the blasting caps have been there for a long time – possibly dating back to the silver boom-era Alpine County experienced back in the late 1860s. Still, despite being possibly more than a century old, explosives should always be treated with extreme caution.

MORE NEWS: No Credible Information Found On Anonymous Threat To Kennedy High; Extra Police On Campus

A bomb squad from Douglas County responded and dealt with the old blasting caps the next morning.