Newport Beach officials reported that more than 400 people, many of them young visitors and minors, were arrested during a chaotic Fourth of July weekend that featured illegal fireworks, street fights, vandalism, looting, and public disorder.

The disturbances began Saturday evening on the Newport Peninsula, where large crowds gathered, reportedly fueled in part by social media promotion of a so-called TikTok meetup.

Videos from the scene showed fireworks being launched into crowds, individuals climbing traffic signals, and groups chanting while creating dangerous conditions.

Nearby businesses, including a Pavilions grocery store, were targeted by looters, and employees at local establishments described aggressive behavior, underage drinking, and harassment.One police officer suffered non-life-threatening injuries after being struck by a mortar-style firework.

City leaders said the unrest prompted a strong law enforcement response under the city's 'Not in Newport' campaign, which included zero-tolerance enforcement, tripled fines within designated safety enhancement zones, and strict rules allowing one-strike revocation of short-term rental permits linked to public safety violations.Mayor Lauren Kleiman said the situation improved once officers secured the area and those refusing police commands were taken into custody.Officials also noted that many of those arrested were from outside Newport Beach, with some traveling from other states.On Sunday, local volunteers cleaned beaches and surrounding areas, removing debris left behind after the celebrations.

City officials plan to conduct a full review of the holiday response to determine what improvements can be made before next year's Independence Day events.