Philippine President Rodrigo Duterte speaks during a news conference in Davao city, southern Philippines August 21, 2016. Picture taken August 21, 2016. REUTERS/Lean Daval Jr

Philippine President Rodrigo Duterte speaks during a news conference in Davao city, southern Philippines August 21, 2016. Picture taken August 21, 2016. REUTERS/Lean Daval Jr

Philippine President Rodrigo Duterte speaks during a news conference in Davao city, southern Philippines August 21, 2016. Picture taken August 21, 2016. REUTERS/Lean Daval Jr

August 23, 2016 4:58 PM (UTC+8)