With Europe reluctant to implement tougher sanctions on Russian oil, Ukraine has taken matters into its own hands.

The strikes aim to prevent Russia from supplying fuel to the occupied regions of Eastern Ukraine and Crimea and curb its effort to circumvent sanctions.

With Europe reluctant to implement tougher sanctions on Russian oil, Ukraine has taken matters into its own hands.

The European Union's proposed 21st sanctions package against Russia has been significantly weakened by disagreements among member states over energy, trade, tourism, and financial…