An extraordinary exchange between Emmanuel Macron and Saudi Arabia’s crown prince, Mohammed bin Salman, has been caught on video.

In audio of the conversation, which covered the murder of the journalist Jamal Khashoggi and the ongoing Yemen war, it is possible to make out Saudi Arabia‘s de-facto leader saying “Don’t worry,” to which the French president responds: “I am worried”.

The Saudi Gazette newspaper posted a video of the meeting online, showing the two speaking in hushed tones with their heads close together on the sidelines of the G20 summit in Argentina.

During the video, Mr Macron can be seen looking the crown prince in the eye as Prince Mohammed nods his head and smiles at times.

Later in the one-minute clip posted on Twitter, Mr Macron says: “You never listen to me,” and Prince Mohammed replies: “I will listen, of course.”

At the end of the video, Mr Macron can be heard saying: “I am a man of my word.”

Jamal Khashoggi death: key figures Show all 7 1 / 7 Jamal Khashoggi death: key figures Jamal Khashoggi death: key figures Jamal Khashoggi Washington Post journalist who was critical of the Saudi regime and the young Crown Prince Mohammed bin Salman, he was murdered on 2 October in the Saudi Arabian consulate in Istanbul AFP Jamal Khashoggi death: key figures Saudi Crown Prince Mohammed bin Salman Heir to the Saudi throne, Mohammed bin Salman has been implicated in the murder, with US officials claiming that he must have known of the plot AFP/Getty Jamal Khashoggi death: key figures 15 man hit squad Turkish police suspect these 15 men of being involved in the murder of Jamal Khashoggi, issued 10 October, 8 days after the journalist disappeared EPA Jamal Khashoggi death: key figures Saud al-Qahtani Aide to Crown Prince Mohammed bin Salman, Saud al-Qahtani is claimed to have ordered Khashoggi's murder Saud Al-Qahtani/Twitter Jamal Khashoggi death: key figures Maher Abdulaziz Mutreb A former diplomat who often travelled with the Crown Prince, Mutreb was initially claimed to be the leader of the hit squad and is pictured here entering the Saudi consulate on the day of the murder AP Jamal Khashoggi death: key figures Mustafa al-Madani First implicated in the 15 CCTV photos released by the Turkish police, al-Madani was later found to have been used as a body double for Khashoggi, leaving the Saudi consulate dressed in his clothes on the day the journalist was killed CNN Jamal Khashoggi death: key figures Salah bin Jamal Khashoggi (L) Son of the murdered journalist met with Crown Prince Mohammed bin Salman on 23 October EPA

France’s Elysee Palace said the video showed “a sort of contrast between MbS’s face sporting an embarrassed smile and the [French] president’s face, which was rather stern, and was keen to convey these messages in a very firm manner.”

An official said Mr Macron conveyed ”very firm” messages to the prince over the murder of Khashoggi and on the need to find a political solution for the situation in Yemen.

They said the French president said Europeans would insist on international experts being part of the investigations into the Saudi journalist’s murder.

Saudi Arabia’s foreign ministry tweeted a picture of Prince Mohammed talking to Mr Macron, but did not go into further detail about the exchange.

On the eve of the G20 summit, Mr Macron called for international involvement in the investigations into Khashoggi’s killing in the Saudi embassy in Istanbul last month.

EU leaders urged G20 participants to address concerns about journalist safety and the Saudi-backed war in Yemen.

US intelligence agencies have concluded the crown prince ordered Khashoggi’s killing, an accusation Saudi Arabia has staunchly denied.

In contrast to his meeting with Mr Macron, the Saudi crown prince shared a smiley, enthusiastic greeting with Russia’s president, Vladimir Putin.

Vladimir Putin and Mohammed Bin Salman shake hands at G20

The two men grinned widely and clasped hands in somewhat of a cross between a handshake and a high-five.

Prince Mohammed patted President Putin’s hand three times as the two leaders took their seats next to each other as the G20 summit opened in Argentina’s capital.