LONDON—After combing through hours of security-camera footage and speaking to hundreds of witnesses, British investigators said Wednesday they believe that the nerve agent used to poison a former Russian spy and his daughter had been applied to the front door of their house. Earlier in the day, the government of Prime Minister Theresa May stepped up its rhetoric against the Kremlin, which it says is most likely responsible for the attack in the English town of Salisbury, saying it would review hundreds of visas granted to...

Source: Wall Street Journal March 28, 2018 17:41 UTC