Brent crude futures were up 10 cents, or 0.2%, at $43 a barrel as of 0049 GMT, and US West Texas Intermediate (WTI) crudefutures rose 14 cents, or 0.4%, to $40.43 a barrel
Brent crude fell 27 cents to $42.97 a barrel by 0114 GMT while US West Texas Intermediate crude was at $40.27 a barrel, down 28 cents
OPEC+ had initially agreed in April that it would cut supply by 9.7 million barrels per day (bpd) during May-June to prop up prices that collapsed due to the coronavirus crisis.
US West Texas Intermediate (WTI) crude was up $2.46 or 8.4% at $31.89 per barrel, its highest since mid-March
The oil market was dealt a heavy blow by the freefall in demand due to the coronavirus pandemic
Russia and Kazakhstan, both members of the broader and informal group known as OPEC+, said they had not yet agreed to a deeper cut
Next year, rising production in other non-OPEC countries such as Brazil and Norway threatens to add to the glut
Russia has expressed concerns that such an extension could prompt a spike in crude production in the US