(ANSA) - BELGRADE, FEB 24 - On the fourth anniversary of Russia's aggression against Ukraine, the meeting of EU foreign ministers to approve the twentieth round of sanctions against Moscow came to a halt. Viktor Orbán's Hungary and Robert Fico's Slovakia vetoed the package, preventing new sanctions against Russia and a €90 billion loan to Ukraine in the Foreign Affairs Council. European Council President António Costa's attempts to persuade Budapest and Bratislava were unsuccessful. He tried unsuccessfully to put pressure on the Hungarian government to approve the package in time for his visit to Kiev with European Commission President Ursula von der Leyen. "In consultation with Slovakia, we halted diesel shipments to Ukraine. Furthermore, the government has vetoed a disbursement of 90 billion euros to Ukraine that was previously approved without Hungary's participation and without imposing any financial burden on us. And the government has decided to veto the twentieth package of war sanctions," Hungarian Prime Minister Viktor Orban told Parliament in Budapest. In Brussels, "we announced that we will block any decision in Brussels that supports Ukraine until Ukraine allows Russian crude oil to pass through Hungary," he said. "Hungary and Slovakia's ultimatums should only be addressed to the Kremlin. These two nations cannot hold the entire EU hostage. We urge both sides to engage in constructive cooperation and responsible behaviour," Ukrainian Foreign Minister Andrii Sybiha tweeted. (ANSA).