PORTLAND Someone dropped tacks over a four mile stretch of the Seattle-to-Portland bike route, causing several bike tires to be punctured and sending at least one injured rider to the hospital Sunday, The Oregonian reports.

It happened on U.S. 30 near Portland.

One rider fell because of the tacks, was knocked unconscious and taken to the hospital. The condition of the rider was not reported by the Oregonian.

A Cascade Bicycle Club spokesperson said it wasn't clear yet who put the tacks down or if it had been reported to police.

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