By Francesco Guarascio BRUSSELS (Reuters) - The European Union will set no minimum on the number of Syrian refugees its member states are willing to take from Turkey in a resettlement scheme to be unveiled on Tuesday, a senior EU official said on Monday. The European Commission, the bloc's executive, will present the proposal following an agreement with Ankara two weeks ago that European leaders hope can help stem the flow of refugees and economic migrants reaching the EU from Turkey via Greece. It will mention no number, the official said, in its plan for deserving cases to be flown directly from Turkey to the EU -- an omission that could disappoint Turkish leaders.