AMESBURY, England—British counter-terrorism officers joined a police investigation on Wednesday after two people were found in critical condition from suspected exposure to an unknown substance near the English city where a former Russian spy was poisoned.
Britain’s Sun newspaper reported that the man and woman had been poisoned and were showing similar symptoms to those displayed by ex-double agent Sergei Skripal and his daughter Yulia who were victims of a nerve agent attack in March.
