"More compromises and more concessions are, I believe, no longer reasonable," says German Chancellor Friedrich Merz after Ukraine's President Volodymyr Zelensky said was willing to meet with Russia's Vladimir Putin for ceasefire talks in Istanbul. Speaking in Berlin following a weekend visit to Kyiv alongside the leaders of Britain, France and Poland, Merz warns Russia of "further sanctions" if no progress is made soon, with areas like the "energy sector and the financial market" possible targets. IMAGES AND SOUNDBITES