The Financial Times carries an interview with Nato secretary-general Jens Stoltenberg who has issued a warning to Russia to cooperate with the west. The paper reports that Mr Stoltenberg said the US-led defence pact was prepared for “a new armed conflict in Europe” if negotiations with Moscow fail. It comes after Russia sent tens of thousands of troops to locations close to its border with Ukraine in recent months – a move the paper notes has sparked fears that it plans a fresh attack on the country.