Massachusetts State Police are warning drivers about a group of over 100 dirt bikers, bicyclists and e-scooter riders who were getting on and off highways around Boston on Saturday.

Troopers first received reports about the group shortly after 2 p.m. after they entered the O’Neil Tunnel on I-93 south via the Zakim Bridge, State Police said in an email. The group soon exited towards Government Center, but rode back onto the highway a short time later.

Troopers then encountered the group in Boston’s Seaport District when one of the dirt bikes collided with a cruiser near the intersection of D and Summer Streets, State Police said. The rider ran away, and troopers soon discovered that the bike had been stolen.

A different 22-year-old dirt biker was arrested at the crash scene, State Police

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