Two vehicles belonging to the company that manages separate waste collection caught fire .
The attack took place last night in Arzana , in the square used by the company to park its vehicles.
The Carabinieri of the Lanusei company are investigating. The Lanusei firefighters are also on site.
The possibility of a short circuit cannot be ruled out, although malicious intent remains the preferred theory .
This is the second similar episode in the last six months.
