WATCH: Obama's reaction to Duterte's warning

President Barack Obama on Monday said he has asked his staff to assess whether it would be productive for him to meet with Philippine President Rodrigo Duterte.

This, after Duterte warned Obama not to question him about extrajudicial killings in his country.

Obama was asked at a news conference in China on Monday whether he intends to meet Duterte, as planned, at a gathering in Laos this week of the Association of Southeast Asian Nations.

Duterte said Obama should not question him about extrajudicial killings, or, as he put it, "son of a bitch, I will swear at you" when they meet in Laos.

Obama said he had heard about the comment and instructed his aides to determine whether it would still be productive to hold the face-to-face meeting.