ISTANBUL - President Tayyip Erdogan said on Monday Turkey would take 'necessary' further steps in northeastern Syria after his meeting with Russian President Vladimir Putin on Tuesday, the day that a five-day Washington-brokered ceasefire expires. 'We will take up this process with Mr Putin and after that we will take the necessary steps,' Erdogan told a forum in Istanbul hosted by broadcaster TRT World, without elaborating. Erdogan is due to hold talks with Putin on Tuesday in Russia's Black Sea resort of Sochi.