Oil prices increased slightly due to concerns about supply tightness in the U.S., following a larger-than-expected draw in crude and gasoline inventories. Brent crude futures rose 0.4% to $72.58 a barrel, while U.S. West Texas Intermediate (WTI) futures gained 0.3% to $67.94 a barrel. The rise comes after a clash between Russia and a mercenary group raised fears of oil supply disruptions, and as the market awaits Saudi Arabia's planned oil output cut. Additionally, comments from ECB President Christine Lagarde on persistently high inflation suggests that rate hikes will continue, potentially impacting oil demand.