Some of Waymo’s robotaxis in San Francisco weren’t as autonomous on Independence Day.

Several San Francisco residents posted images Saturday night of Waymo vehicles malfunctioning, stalling or being towed during the chaos of Fourth of July celebrations.

“We’re told it could take 3-4 hours to tow the disabled vehicles before traffic can move again,” wrote an X user who goes by the name Marco Gutierrez under a video of a towed Waymo.

Other X users posted images of stopped cars, traffic jams, and, in one case, a Waymo driving directly through a case of erupting fireworks.

Waymo spokesperson Chris Bonelli told Business Insider that severe traffic congestion disrupted normal operations for some of the company’s cars.

“In coordination with local authorities and emergency services, our roadside assistance team worked quickly to remove our vehicles from the area,” Bonelli said. “Our team is always evaluating ways to strengthen Waymo’s resilience in major traffic disruptions.”

Waymo said north San Francisco experienced heavy traffic congestion during Saturday’s celebrations, as well as unplanned road closures after the Golden Gate Bridge fireworks. The company said some of its vehicles were stuck in the traffic jam, while others were able to move away once the congestion cleared. Some vehicles ran out of charge while idling and had to be towed.

The company said its roadside assistance team handled towing logistics, no injuries were reported and the vehicles were operating fully autonomously.

Waymo’s autonomous navigation relies on a multi-sensor system (29 cameras, five lidars and six radars) to give your AI controllers Different ways of perceiving an environment. So far, the Alphabet company has deployed around 2,500 robotaxis in several cities in the United States.