Manila, June 9 -- The Department of the Interior and Local Government (DILG) will investigate the dumping of garbage in front of the Department of Environment and Natural Resources (DENR) office in Davao City, Malacanang said Tuesday.

Palace Press Officer Claire Castro said Interior Secretary Jonvic Remulla has assured the Palace that the incident would be thoroughly investigated.

"Magkakaroon po ng malalimang pag-iimbestiga rito (There will be a thorough investigation into this matter)," Castro said during a Palace briefing.

Asked about possible sanctions against Davao City Mayor Sebastian Duterte or other officials involved, Castro said the DILG would first determine whether negligence or violations of environmental laws had been co...