Best Photos of the Week

Salisbury, England

Members of the emergency services in green biohazard suits afix a tent over the bench where a man and a woman were found in critical condition. The investigation into the attempted murder of Sergei Skripal widened, as police sealed off the graves of his wife, Liudmila, and son, Alexander, and confirmed that a total of 21 people had been treated as a result of the incident. The police officer who was exposed to the nerve agent used on the Skripals, named on Thursday as DS Nick Bailey, remained in a serious but stable condition.
Photograph: Ben Stansall/AFP/Getty Images