Dawn Sturgess, a British woman, has died after being poisoned by a nerve agent.

Peskov said Russia is deeply worried by the continuing presence of these poisonous substances on British territory and that he considers it a danger not only for the UK but for other Europeans.

Peskov said the investigation and what is happening in the Salisbury area is a British issue which has nothing to do with the upcoming summit between President Vladimir Putin and US President Donald Trump.