BRUSSELS (Reuters) - French President Francois Hollande said on Tuesday the European Central Bank would ensure minimum liquidity for Greece until Sunday, which is the last deadline to reach agreement on a new rescue package for Greece. Speaking after an emergency meeting of euro zone leaders in Brussels, Hollande said a deal was still possible even if time was running short: "The ECB will ensure minimum liquidity for Greece until Sunday," Hollande told a news conference. (Reporting by Julia Fioretti; Editing by Alastair Macdonald)