Uncertainty loomed over what Saudi Arabia, Russia and six other key members of the OPEC+ alliance would decide on crude output in their meeting on Sunday, with analysts saying a production boost was also being considered.

The meeting by the group of eight oil-producing countries known as the "Voluntary Eight" (V8) comes as oil prices extended losses in anticipation of excess supply in the coming months.

In a bid to prop up prices, the wider OPEC+ group -- comprising the 12-nation Organization of the Petroleum Exporting Countries (OPEC) and its allies -- had agreed in recent years to several output cuts that amounted to almost six million barrels per day (bpd) in total.

Since April, the V8 group -- namely Saudi Arabia, Russia, Iraq, United Arab Emirates, Kuwait, Kazakhstan, Algeria and O

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