The last four governors of Sicily were among 13 people placed under investigation Wednesday over a dramatic landslide that hit the Sicilian town of Niscemi in January, judicial sources said.

Centre-right officials Raffaele Lombardo, Rosario Crocetta, Nello Musumeci and Renato Schifani are being probed on suspicion of culpable negligence, the sources said.

The massive landslide in the town near Caltanissetta swept homes and vehicles down the valley, leaving dozens of buildings hanging in the air.

Approximately 1,500 people were displaced.