An event in downtown LA became unruly Saturday night, prompting a large response from the Los Angeles Police Department.

Officers were met with rocks and bottles as they responded to the skating event near 1st and Hill Street, according to the LAPD.

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Police declared unlawful assembly and formed skirmish lines in an attempt to disperse the crowd.

A Waymo vehicle was damaged in the chaos, police said.

One person has been arrested, though the reason for the arrest remains unclear.

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