Putin says Russia wants to be part of British probe into poisoning of ex-Russian spy

Russia's President Vladimir Putin says Moscow wants a thorough probe into the poisoning of an ex-Russian spy in Britain and will demand to be part of it.

Mr Putin, speaking on Tuesday in Ankara following talks with Turkish President Recep Tayyip Erdogan, cited the head of Britain's defence laboratory who said that its scientists have not identified the precise source of the nerve agent used to attack former double agent Sergei Skripal and his daughter, Yulia.