Theresa May used a meeting with the Saudi Crown Prince at the G20 summit to "encourage" him to make sure Saudi Arabia co-operates in the investigation into murdered journalist Jamal Khashoggi.
During the meeting, the two sides discussed the horizons of bilateral cooperation between the two friendly countries in the various political, security, economic, investment, agricultural, energy, cultural, and technological fields, Saudi Press Agency reported.
It says Mr Macrontold MBS that Europeans wanted worldwide investigators to take part in the probe on Mr Khashoggi's death and stressed "the necessity of a political solution in Yemen".
Khashoggi's killing has sparked widespread outrage but Western powers have pledged to maintain close relations with Saudi Arabia, a top oil producer and buyer of U.S. weapons. Saudi Arabia denies that bin Salman ordered the killing, but US intelligence agencies have concluded the opposite. Mr. Trump told reporters Friday the reason he wasn't meeting with the crown prince in Argentina was that his staff never set it up.
Instead the US president appeared to barely acknowledge MBS, as he's known, before taking his place for the photo between French President Emmanuel Macron and Japanese Prime Minister Shinzo Abe.
The Saudi ruler's presence at the summit is seen as a test of his future status on the world stage in the wake of the Jamal Khashoggi murder.
The face-off came after Russian President Vladimir Putin greeted Bin Salman with an apparent "high five".
A senior White House official said the two exchanged pleasantries.
According to a Guardian analysis of their only partly audible conversation, Macron replies to the crown prince's assurances: "I do worry".
Mr Trump cancelled his meeting with Mr Putin and G7 foreign ministers put out a strong statement expressing their "utmost concern".
Missing the summit's opening and traditional G20 "family photo" of heads of state and government on Friday was German Chancellor Angela Merkel, who was delayed by more than 12 hours due to technical problem on her plane.
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