Moscow would face more EU sanctions if pro-Russia separatists attack the Ukrainian port of Mariupol, Reuters cited French Foreign Minister Laurent Fabius as saying on Wednesday. Kiev fears Mariupol, with its 500,000 people, could be the next major rebel target after separatists took the strategic railroad town of Debaltseve, its foreign minister Pavlo Klimkin said after ceasefire talks in Paris two weeks ago. "The problem today is particularly around Mariupol. We've told the Russians clearly that if there was a separatist attack in the direction of Mariupol things would be drastically altered, including in terms of sanctions," Fabius said.