Saudi Crown Prince Mohammed bin Salman met Russian President Vladimir Putin on the sidelines of G20 summit in Argentina.
On the first day of the summit, President Putin and the Crown Prince exchanged a high-five and laughed heartily together as they took seats next to each other at a plenary session.
Russia has refrained from criticising Saudi Arabia or the crown prince over the killing. Putin said in October he lacked information about the matter and said Russia would not tear up its relations with Saudi Arabia because of it.
The Organisation of the Petroleum Exporting Countries as well as Russia and other leading oil producers will meet in Vienna on Dec 6-7 to discuss further steps on the oil market as prices have been declining due to oversupply.
Riyadh has suggested OPEC and its allies reduce output by 1 million barrels per day from January 2019 to stem the price falls.