Russia is to expel 23 British diplomats amid tensions over the nerve agent attack on an ex-spy and his daughter in the UK.

The move comes in response to Britain's decision to expel 23 Russian diplomats.

They were ordered to leave over the incident in Salisbury which the UK government has blamed on Russia.

The Russian foreign ministry, in a statement quoted by news agency AFP, said the British diplomatic staff would be "expelled within a week".

This breaking news story is being updated and more details will be published shortly. Please refresh the page for the fullest version.

You can receive Breaking News on a smartphone or tablet via the BBC News App. You can also follow @BBCBreaking on Twitter to get the latest alerts.

http://www.bbc.com/news/uk-43440992