A supporter of Venezuela's President Nicolas Maduro participates in the May Day celebrations in Caracas, Venezuela May 1, 2022 Photo: Reuters

A demonstrator attends the May Day rally outside the Casa Rosada presidential palace in Plaza de Mayo, in Buenos Aires, Argentina May 1, 2022. Photo: Reuters

A firefighter of the police tries to extinguish a flare fired by demonstrators during a May Day protest in Hamburg, Germany, May 1, 2022. Photo: Reuters

Police gather amid burning flares during a May Day protest in Hamburg, Germany, May 1, 2022. Photo: Reuters

Police detain a protestor during a May Day demonstration in Berlin, Germany, May 1, 2022. Photo: Reuters

Former Brazil's President Luiz Inacio Lula da Silva, who will run in October's elections, gestures as he takes part in an event organized by labor unions during Workers Day in Sao Paulo, Brazil May 1, 2022. Photo: Reuters

Demonstrators attend the May Day rally in Buenos Aires, Argentina May 1, 2022. Photo: Reuters

A man holds a weapon as he clashes with demonstrators (not pictured) during the May Day rally in Santiago, Chile May 1, 2022. Photo: Reuters

Left-wing demonstrators stand in front of police officers as they take part in a May Day protest in Hamburg, Germany, May 1, 2022. Photo: Reuters

Smoke bombs are seen during a May Day demonstration in Berlin, Germany, May 1, 2022. Photo: Reuters

Demonstrators take part in a May Day protest in Berlin, Germany, May 1, 2022. Photo: Reuters

Thousands march to Revolution Square to mark May Day, in Havana, Cuba May 1, 2022. Photo: Reuters

Demonstrators carry flags and banners as they attend the May Day rally in Santiago, Chile May 1, 2022. Photo: Reuters

A demonstrator holds a flag during the May Day rally in Santiago, Chile May 1, 2022. Photo: Reuters

French CRS riot police gather amid clashes during the traditional May Day labour union march in Paris, France, May 1, 2022. Photo: Reuters

A demonstrator flashes V-sign during a May Day rally in Istanbul, Turkey May 1, 2022. Photo: Reuters

People take part in a May Day rally in Istanbul, Turkey May 1, 2022. Photo: Reuters

Turkish riot police surround a group of protesters as they attempted to defy a ban and march on Taksim Square to celebrate May Day in Istanbul, Turkey May 1, 2022. Photo: Reuters

Supporters of Philippine Vice President and presidential candidate Leni Robredo cheer during a Labor Day celebration, in Quezon City, Metro Manila, Philippines, May 1, 2022. Photo: Reuters

People hold flares as they attend the protest "Take back the night" during the so-called Walpurgis Night ahead of May Day in Berlin, Germany, April 30, 2022. Photo: Reuters