GUTHRIE CENTER, Iowa —

Repair shops in the Guthrie Center area are noticing a concerning trend.

While fixing tires, they're finding large spikes called caltrops, according to the Guthrie County Sheriff's Office.

In the following picture, you can see that some of them are over an inch long.

Guthrie Center Sheriff's Office Facebook

The Guthrie County Sheriff's Office is asking for help finding whoever might be behind these incidents. They ask anyone with information to call them at (671) 767-2214.

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