- Russian spy: Attack was ‘brazen and reckless’, says Amber RuddBBC News
- A Hunt for Evidence Tying Russia to Nerve Gas AttackBloomberg
- Russia spy Sergei Skripal: What we know about his poisoningUSA TODAY
- The long, terrifying history of Russian dissidents being poisoned abroadChicago Tribune
- UK: Nerve Agent Attack on Ex-Spy Was ‘Brazen and Reckless’U.S. News & World Report