Philippines' president-elect Rodrigo Duterte vowed Sunday to reintroduce capital punishment and give security forces "shoot-to-kill" orders.

"What I will do is to urge Congress to restore death penalty by hanging," Duterte told a press conference in the southern city of Davao.

He also said he would give security forces "shoot-to-kill" orders for assaults on organised crime or against criminals who violently resist arrest.