(CNN) -- Clothing and soil samples taken from an alleged August 21 chemical weapons attack in the Damascus area have tested positive for sarin, the UK prime minister's office said Thursday.
The samples, tested at Britain's Porton Down laboratory, were taken from a person who reportedly was treated as a result of the alleged attack.
The UK is sharing the information with the United Nations and the Organization for the Prohibition of Chemical Weapons, the office said.
From CNN's Andrew Carey in London
™ & © 2013 Cable News Network, Inc., a Time Warner Company. All rights reserved.