Thousands of people gathered in the center of Thessaloniki, in northern Greece, on Saturday to hold a peaceful protest against gold mining in nearby Skouries, which is on the Halkidiki peninsula.

Rallies against the project were also held across several European cities on the same day, the protest march’s organizers said.

Protesters, chanting slogans against the conservative-led coalition government and the Canadian gold-mining firm that is in charge of the environmentally contentious project, marched to the headquarters of Thessaloniki-based now-defunct state broadcaster ET3 in solidarity with dismissed staff who have been occupying the premises for the past few months since a government-imposed shutdown.