Philippine President Rodrigo Duterte said Wednesday he was ready to discuss any issues with Barack Obama when they meet in Laos next week, but added that the U.S. president must listen to him first before bringing up the question of human rights.

Washington has expressed concern about a surge in drug-related killings since Duterte became president two months ago promising to wipe out narcotics in the Southeast Asian nation.

Asked if he would be willing to discuss human rights at his meeting with Obama on the sidelines of an East Asia summit on Sept. 6, Duterte told reporters: "Depends to what degree."