Saudi Arabia's Energy Minister Khalid al-Falih talks to journalists during a meeting of the Organization of the Petroleum Exporting Countries (OPEC) in Vienna, November 30, 2016.

Saudi oil minister Khalid al-Falih said on Saturday that more work was needed to bring global oil inventories down.

"There is a general satisfaction with the strategy of 24 countries that signed a declaration of cooperation", he said after meeting attended by his Russian, Uzbek and Kazakh counterparts.