The EU is working on yet another raft of sanctions against Russia, but the leaders made little headway. A key aim is to make further progress in blocking Russia's “shadow fleet” of oil tankers and their operators from earning more revenue for Moscow's war effort.

The EU's 27 leaders have agreed to extend sanctions on Russia for another six months, resolving fears that Kremlin-friendly Hungary would let the measures lapse, officials said.

EU leaders agreed on Thursday to renew sanctions imposed against Russia over Moscow's war in Ukraine for another six months, two EU officials said.