The Russian diplomatic mission stressed that "there still are no clear answers to the key questions related to the Skripal case"

The U.K. sanctions Russia's GRU over the Salisbury poisoning, holding Putin accountable for the tragic death of Dawn Sturgess.

Dawn Sturgess, 44, was unwittingly caught up in an assassination attempt against the former Russian spy Sergei Skripal.

The Russian diplomatic mission stressed that "there still are no clear answers to the key questions related to the Skripal case"