A UN report on Syria said Tuesday there are “reasonable grounds” to believe that limited quantities of toxic chemicals have been used as weapons in at least four attacks in Syria’s civil war, but that more evidence is needed to determine the precise chemical agents used or who used them.
The UN Commission of Inquiry said conclusive findings can be reached only after testing samples taken directly from victims or the site of the alleged attacks. It called on Damascus to allow a team of experts into the country, saying lack of access continues to hamper the commission’s ability to fulfil its mandate.
U.S. President Barack Obama had previously declared the use of chemical weapons his “red line” for forceful U.S. intervention in Syria. He has since come under pressure to take action amid mounting allegations that President Bashar Assad’s regime has crossed that line.