Deadly Russian spy poison was "planted in daughter's suitcase before she left Moscow"

Intelligence agencies now believe that the nerve agent used to poison former Russian spy Sergei Skripal and his daughter Yulia was planted in the daughter's suitcase before she left Moscow.
Intelligence agencies believe it is the most likely scenario for the attack on Sergei Skripal, 66, and his daughter Yulia, 33. The double agent's daughter came to visit the week before the pair was found slumped on a bench in Salisbury, England.

According to the Telegraph, senior sources are "convinced" the Novichok nerve agent was placed in Yulia's luggage via clothing, cosmetics or a gift and was opened in Britain. It makes the job of pinpointing who was behind the attack even more difficult, as the hit squad would not even have had to enter the country.
Sergei and Yulia remain critically ill in hospital.