Two bins have been removed from a cordoned-off area in Salisbury as part of the investigation into the nerve agent poisonings.
Specialist teams removed them from behind shops in Catherine Street at around 11am on Thursday.
They have been taken to the Defence Science and Technology Laboratory at Porton Down in Wiltshire for analysis.
It comes as officers from the Counter Terrorism Policing Network continue to speak to Charlie Rowley, who fell critically ill after finding a sealed box of perfume containing the deadly nerve agent Novichok.
His partner Dawn Sturgess died after coming into contact with the nerve agent after spraying the liquid on her wrists.
The advice from Public Health England remains that the risk to the public is low.
Searches are still taking place at the Queen Elizabeth Gardens in Salisbury, where Dawn Sturgess and Charlie Rowley visited prior to them falling ill.
The search is a precautionary measure, to ensure there is nothing of relevance to the investigation there and ensure it is safe.