Mr Khelil says Opec must implement production cuts for prices to stabilise
Opec countries must implement agreed production cuts if they want stable oil prices, the cartel's head has warned.
Saudi Arabia, the world's biggest oil exporter, would be key to the success of any cutbacks, said Chakib Khelil.
Mr Khelil said markets were waiting for Opec countries to cut output, as agreed in Vienna last month.
Meanwhile Russia has said it will cut its oil export duties, in order to help the country's oil producers cope with declining prices.