Iran’s president said Saudi Arabia would not have killed journalist Jamal Khashoggi at its consulate in Turkey without the backing of the United States, according to a report on Wednesday.

“No one would imagine that in today’s world and a new century that we would witness such an organized murder and a system would plan out such a heinous murder,” President Hassan Rouhani told the state-run Islamic Republic News Agency, Reuters reported. “I don’t think that a country would dare commit such a crime without the protection of America.”

President Trump called Saudi Arabia’s handling of the explanation of Khashoggi’s death the “worst cover-up ever,” and his administration has revoked the visas of some Saudi officials implicated in the killing.

Rouhani also Saudi Arabia would not be able to carry out bombings in Yemen unless the UN supported the operation.

“If there was no American protection, would the people of Yemen still have faced the same brutal bombing?” Rouhani said.

The United States is backing Saudi Arabia and supplying military equipment in the kingdom’s fight against Iranian-backed Houthi rebels in Yemen.

Critics claim Saudi forces have targeted hospitals and schools, killing thousands of civilians, and have created the conditions for a humanitarian crisis in the country.

Khashoggi, whose writings for the Washington Post were critical of Saudi Crown Prince Mohammad bin Salman, vanished after entering the Saudi consulate in Istanbul on Oct. 2.

Saudi officials said he was accidentally strangled after getting into a fistfight with a Saudi security team.