The ceremony, held atop San Cristobal Hill, was led by Marino de los Santos, who described the site as an Apu, or “mountain of power.”

The 27-square-kilometre territory, home to about 3,000 people spread across more than 10 villages, is claimed by both nations.

Colombian President Gustavo Petro accuses Peru of violating a 1934 treaty, while Lima insists the land was designated Peruvian in 1922. Peru says it will engage in talks but will not cede the land.