Among the sites they are searching is the Zizzi restaurant, which is closed to the public. Pic/AFP

British media reported yesterday that traces of the nerve agent used to attack a Russian ex-spy and his daughter have been found in Salisbury where the two were poisoned. BBC said its sources say traces were found at a restaurant where Sergei Skripal and his daughter Yulia reportedly ate before falling critically ill, and a pub. BBC also reported that up to 500 people who dined at the restaurant or frequented the pub have been told to wash their possessions as a precaution. Sky News says traces were found in several locations.