Tampa, Florida -- A warning if you're thinking of working out on the Courtney Campbell Trail Monday morning.
Thumb tacks and carpet tacks flattened dozens of bicycle tires on Sunday. Tampa Police officers are now trying to figure out who put the tacks there.
Police say there were several bikes with flats, causing over $600 of damage.
Officers tried to remove as many tacks as they could find by using a magnetic roller.
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