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SANTIAGO (Reuters) - Eighteen semi trucks used to transport food were set on fire in a parking lot in the southern Chilean city of Temuco on Saturday, local authorities said.

The incident appeared to be intentional and the governor of the region of Araucania, Nora Barrientos, told local radio that evidence gathered at the scene linked the fires to Weichan Auka Mapu, a resistance group formed by the indigenous Mapuche.

Weichan Auka Mapu has previously claimed responsibility for arson attacks in southern Chile, where it wants to regain land lost during Chile’s nineteenth century expansion southward into Mapuche-held territory.

Barrientos said authorities were investigating and evaluating legal actions.