Speaking following an informal summit of EU leaders in Brussels on Thursday, Tusk said the European Union could introduce further restrictive measures against Russia if necessary, but was not planning on any additional sanctions at the moment.
Meanwhile German Chancellor Angela Merkel told reporters that fresh EU sanctions could be enforced if the ceasefire agreement reached in Minsk is not fully implemented.
The European Union, the United States and their allies have introduced several rounds of sanctions against Russia over its alleged involvement in the Ukrainian crisis, without presenting any factual evidence to back the claim. The restrictive measures target Russia's banking, defense and energy sectors.
Russia, which has acted as one of the mediators in various formats of Ukraine reconciliation talks, has repeatedly stressed that sanctions are counter-productive and hurt not only the target country, but those using the measure as well.