ITOGON, Benguet: At least 500 more houses in Barangay Virac in Itogon town are at risk of being gobbled up by a 150-meter long sinkhole that sank six houses during the onslaught of typhoon “Lando” last month.

This came up as a joint probe of the Mines and Geosciences Bureau (MGB), police, local government unit and Benguet Corporation started yesterday (Monday) for a comprehensive study.