Philippines' President-elect Rodrigo Duterte answers questions during a news conference in Davao City, southern Philippines May 31, 2016. REUTERS/Lean Daval

Philippines’ President-elect Rodrigo Duterte answers questions during a news conference in Davao City, southern Philippines May 31, 2016. REUTERS/Lean Daval

Philippines' President-elect Rodrigo Duterte answers questions during a news conference in Davao City, southern Philippines May 31, 2016. REUTERS/Lean Daval

June 1, 2016 11:20 AM (UTC+8)