Protesters lit bonfires in the street, looted shops and pelted cops with rocks and chunks of pavement in Hamburg Friday in a wave of violent demonstrations outside of the G-20 summit.

Thousands of German cops in riot gear clashed with thousands of anti-capitalist protesters for the second day as the demonstrators tried to disrupt the meetings where President Trump and other world leaders had gathered.

Cars were also set ablaze, and the rioters prepared arsenals of rocks, bottles and other projectiles to hurl at the police.

“I’m sure we can’t stop all these leaders from meeting, but if we can stop them from getting their food or catering shortly, we’ve achieved something,” said Karl S, a student protester from Dusseldorf who declined to give CNN his full name.

German Chancellor Angela Merkel condemned the protests as “unacceptable.”

“I have every understanding for peaceful demonstrations,” said Merkel. “But violent demonstrations endanger human lives, they endanger people themselves, they put police officers and security forces in danger, put residents in danger, and so that is unacceptable.”

Mayor de Blasio arrived in Hamburg on Friday after fleeing the Big Apple the day before on a surprise trip to attend a leftist protest related to the G-20 summit.

He was expected to attend several events surrounding the summit, including Saturday’s Hamburg Zeigt Haltung (“Hamburg Shows Attitude”) rally.

Meanwhile, dramatic video footage of the protests showed blazes and billowing smoke engulfing the city’s streets amid the protests carried out by throngs of demonstrators.

During the violent demonstrations, police trucks blasted away at protesters with water cannons.

Officers dragged away a group holding a sit-in at the red-zone entrance to the grounds where the G-20 summit was being held.

Since Thursday, 196 officers have been injured, according to police.

At least 83 people were arrested and 19 people were detained, Hamburg police said on Twitter.

The police department also posted a plea to the “peaceful protesters” to “distance” themselves from the violent rioters.

As nighttime descended on the city, protests escalated in Sternschanze, a quarter in the center of Hamburg where rioters smashed windows, chucked stones at police and set several fires, according to AFP reporters.

With Wire Services