Kiev , Ukraine ( CNN ) -- Some 70 % of the Russian troops believed to have been in Ukraine have withdrawn back across the border , Ukrainian President Petro Poroshenko said , according to the national news agency Ukrinform . `` This is another hope that peaceful initiatives have a good perspective , '' Poroshenko is quoted as saying during a Cabinet meeting in Kiev on Wednesday . The remarks came several days into a shaky ceasefire deal between Ukrainian forces and pro-Russia rebels , signed last Friday after nearly five months of fighting in eastern Ukraine . The Presidents of Russia and Ukraine are `` broadly satisfied '' with the status of the ceasefire , a Kremlin aide said Wednesday . President Vladimir Putin and Poroshenko spoke by phone Tuesday night , Kremlin foreign policy adviser Yuri Ushakov told Russia 's Interfax news agency . `` On the whole , satisfaction was expressed on our part and by the Ukrainian side with how the ceasefire is being observed although it is a difficult process , '' Ushakov said . Moscow has repeatedly denied allegations by Kiev and the West that it is sending Russian troops over the border into Ukraine . Meanwhile , EU leaders are weighing whether to pull the trigger on tougher sanctions against Russia . Talks are planned Thursday in Brussels among diplomats from the 28 member nations , following a decision Monday to put on hold for at least a `` few days '' a new package of economic penalties against Russia over its encroachment in Ukraine . The delay offered more time to assess the effectiveness of the ceasefire without risking further trade retaliation by the Kremlin , which has said it will respond if new sanctions come into force . OSCE to deploy drones . The chairman of the Organization for Security and Cooperation in Europe , which is monitoring the truce , said Wednesday that more observers would be sent to eastern Ukraine . `` Around 70 specialists are in the Donetsk and Luhansk regions this week already to monitor the ceasefire . Further monitors are being recruited and deployed as we speak , '' Didier Burkhalter said . The OSCE will be using its own drones over the region soon , he said . A discussion is also under way on the possible deployment of drones from some of the 57 member states of the OSCE . Burkhalter , who is also the Swiss President and Foreign Minister , said his country was ready to support the OSCE mission in Ukraine with up to 10 additional monitors and an extra 500,000 euros ( $ 647,000 . ) MH17 crash report . Russian Defense Minister Sergey Shoigu blamed Ukraine for the crash of Malaysia Airlines Flight 17 in comments Wednesday after meeting with Malaysian Defense Minister Hishammuddin Hussein in Moscow , Russia 's state-run Itar-Tass new agency reported . `` The catastrophe happened in the skies of Ukraine , which is fully responsible for what happened , '' Shoigu is quoted as saying . `` I 'm convinced that this tragedy would n't have happened if Ukraine had solved its internal crisis without use of military force , including artillery , missiles , and war aviation . '' A preliminary report into the crash in July , released by Dutch aviation investigators Tuesday , said the plane was brought down by `` high energy objects '' from outside . The U.S. and Ukraine have accused pro-Russian separatists operating in the region of downing the plane , which had 298 people on board , using a Russian-made missile system . The report supports the theory of a warhead exploding in close proximity to the passenger jet , but it does n't point any fingers at who might have fired it . Victoria Butenko reported from Kiev ; Laura Smith-Spark wrote from London .
NEW : Russian foreign minister says Malaysia Airlines Flight 17 crash was Ukraine 's fault . Ukrainian and Russian Presidents are satisfied by this , official says . Petro ##ff : ` ` This is another hope that peaceful initiatives have a good perspective '' Moscow has repeatedly denied sending Russian troops into Ukraine .