Oil prices were little changed on Tuesday after three days of declines on mounting oversupply concerns after OPEC+ agreed to another large output increase in September, though the potential for more Russian supply disruptions supported the market. Brent crude futures were unchanged at $68.76 a barrel by 0036 GMT while U.S. West Texas Intermediate crude was at $66.27 a barrel, down 2 cents, or 0.03 per cent. Both contracts fell by more than 1 per cent in the previous session to settle at their