French President Emmanuel Macron has said he thinks a deal to avoid full scale war in Ukraine is possible and that it is legitimate for Russia to raise its own security concerns.
Before talks in Moscow with Russian President Vladimir Putin on Monday, he called for a "new balance" to protect European states and appease Russia.
He restated that the sovereignty of Ukraine was not up for discussion.
Russia has massed troops on Ukraine's border but denies planning to invade.
Moscow has made a string of demands, including that the Nato defence alliance rule out Ukraine becoming a member, and that it reduce its military presence in eastern Europe.
Western countries have rejected this, instead suggesting other areas of negotiation, for example talks on cutting back nuclear weaponry.