Finance ministers of the G7 nations vowed Saturday to step up efforts to prevent Russia from evading sanctions imposed after its invasion of Ukraine. “We remain committed to taking further initiatives in response to oil price cap violations,” the group said in a statement following a meeting in Washington. Those further steps were not spelled out in detail. In December 2022, the G7 together with the European Union and Australia agreed to pressure purchasers of Russian oil to not go above a certain price ceiling. The agreement was intended to limit Russian petroleum sales and revenues without c…