Philippine President Rodrigo Duterte insulted the U.S. ambassador to his country, calling him “gay” and a “son of a whore” in recent televised remarks.

Duterte, who took office in June after serving as the mayor of the city of Davao, openly spoke about his rocky relationship with U.S. Secretary of State John Kerry’s ambassador, Philip Goldberg, acknowledging that he is “fighting” with Goldberg in an interview that aired in the country Friday, The Guardian reports.

“His gay ambassador, the son of a whore. He pissed me off,” Duterte said in Tagalog, according to the newspaper.

The leader of the Philippines, who has been known to make controversial statements, said Goldberg “meddled” during his presidential campaign.

Goldberg had criticized Duterte on the campaign trail over comments Duterte made in 1989 regarding the rape and murder of an Australian missionary in a prison in Davao while he was mayor, CNN reports. “I was angry she was raped, yes, that was one thing. But she was so beautiful, I think the mayor should have been first. What a waste,” Duterte said at the time, according to CNN.

U.S. State Department spokeswoman Elizabeth Trudeau said the department has asked the Filipino chargé d’affaires to “clarify” Duterte’s recent remarks about Goldberg, CNN said.

Get The Brief. Sign up to receive the top stories you need to know right now. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Contact us at letters@time.com.