The Saudi, Russian, Qatari and Venezuelan oil ministers visited Doha for a previously undisclosed meeting - their highest-level discussion in months on joint action to help prices recover from their lowest in more than a decade.
The Saudi minister, Ali al-Naimi, said freezing production at January levels was an adequate measure and new steps to stabilise the market could be considered in the next few months.
He said he hoped other producers would adopt the proposal, while Venezuela's Oil Minister Eulogio Del Pino said more talks would take place with Iran and Iraq on Wednesday.
