Some moai, the iconic sculpted statues of Easter Island, were hit by the flames that have burned the area of Ranu Rarakui volcano since Monday.
"About 60 hectares have been destroyed, including some moai," Carolina Pérez, Undersecretary for Cultural Heritage of the Ministry of Culture, Arts and Heritage, said on Twitter.
The damage caused by the fire is "irrecoverable," Pedro Edmunds, Mayor of Easter Island, told local media.
Ariki Tepano, director of the Màu Henua community responsible for the administration and maintenance of the park, also defined the damage as "irreparable".
"The moai are completely burned," he said.
The fire occurred three months after the island reopened to world tourism on August 5, after two years of closure due to the coronavirus pandemic.
Before the pandemic, Easter Island, whose main source of livelihood is tourism, received around 160,000 visitors a year, with two flights a day.
But with the arrival of Covid-19 in Chile, the tourist activity was completely suspended.
Today the site will be closed to visitors to allow for investigations and observations by the conservation department team who will make an estimate of the damage caused by the fire.