Adam Harrison, 22, of Winthrop, tells Boston 25 News he was riding his pedal bike innocently and never rode on the highway or in the tunnel. He simply caught up with the group in the Seaport District and was in the back of the pack when he was arrested,

A group of over 100 bicycles, dirt bikes and motorized scooters was seen riding on and through highways and tunnels in Boston Saturday afternoon, police said.