Police arrested one person after a large crowd of young people caused a "disturbance" Wednesday night as the group swarmed streets in Old Town and Lincoln Park near North Avenue Beach, officials said.
Social media video from the scene shows a large crowd of youths walking, along with heavy police presence, on the 1600 block of North LaSalle Drive.
Video also shows an altercation taking place.
Around 11:25 p.m., police said they told the crowd to disperse. An 18-year-old was arrested after ignoring verbal commands and continued to try and cause bodily harm to several individuals, police said.
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The person was placed into custody and charged with reckless conduct, authorities said.
Details on why the crowd gathered or what caused the disturbance weren't immediately available.