Businesses in downtown Geneva boarded up storefronts with wooden panels as protests against the G7 summit turned violent on Sunday. Demonstrators set a Tesla vehicle on fire and smashed windows at a UN office during anti-G7 marches in the Swiss city.

The June 15-17 G7 summit of leading industrialized nations is being held in Evian-les-Bains, France, on Lake Geneva, where leaders including U.S. President Donald Trump will discuss the Middle East, Ukraine and global economic imbalances. Activist groups including environmentalists, feminists and anti-capitalist organizations had called for large demonstrations.

Swiss and French authorities deployed extensive security measures for the gathering. The Swiss government said the army will deploy 4,000 personnel to support police, with operations including airspace and road restrictions and patrols on Lake Geneva. France deployed more than 13,000 police and gendarmerie officers in the summit area, with over 800 border control officers active compared to the normal 60.

Earlier protest activities included a flotilla of around 20 boats displaying anti-G7 and pro-Palestinian banners on Lake Geneva on Saturday. About 20 protesters were detained on Friday evening, according to Swiss media reports. Between 100 and 150 people had gathered in Geneva for a protest bicycle ride, chanting anti-G7 and pro-Palestinian slogans.

Business owners expressed concern about potential property damage, remembering violent protests that occurred during the G8 summit in 2003. Geneva closed a major park where activists had wanted to congregate, and only seven of 35 roadway border crossings remained open.

Francoise Nyffeler, spokesperson for the NoG7 coalition organizing the demonstrations, said protesters wanted to express opposition to policies of G7 leaders on issues including tariffs, military conflicts and climate change. French security forces displayed drone-interception equipment and conducted motorboat patrols as part of heightened security measures.