Philippine president Rodrigo Duterte warned Barack Obama Monday not to question him about extrajudicial killings or "I will swear at you" at an upcoming summit.
The leader — often described as southeast Asia's answer to Donald Trump — was speaking at a news conference ahead of this week's ASEAN regional meeting in Laos.
Duterte has faced international criticism, including from Washington, over the killings of more than 2,000 suspected drug pushers.
Answering a reporter's question about how he intends to explain the extrajudicial killings to Obama.
Obama must be respectful and not just throw questions at him, or else, "Putang ina, I will swear at you in that forum," he said, using a Tagalog phrase for "son of a *****."
He said he was leader of a sovereign country and answerable only to the Filipino people.
When Obama was asked at a news conference in China whether he would press ahead with a plan to meet with Duterte at a gathering in Laos this week of the summit, Obama said he had instructed his staff to determine whether a meeting would be "productive."
Obama called the Philippines a close "friend and ally" of the United States and shrugged off Duterte's statement.
"Clearly, he's a colorful guy," Obama said.