London (CNN)The son of a woman killed after a Novichok attack against ex-Russian spy Sergei Skripal has urged Russian President Vladimir Putin to hand over two suspects to the UK for questioning.
Monday marks one year since Skripal and his daughter Yulia were poisoned in the English city of Salisbury, in an attack that stunned the region.
The pair recovered in hospital but Dawn Sturgess, who was accidentally exposed to the military-grade nerve agent, subsequently died.
