The Organization for the Prohibition of Chemical Weapons says its workers need at least 4 more months to destroy the stockpile of chemical agents removed from Syria.
Toxic materials have been transferred to US vessels and facilities in various countries. The OPCW had hoped to destroy them by the end of this month.
But, the transfer of declared chemical agents from Syria had been hampered by the country's worsening security situation.
In the meantime, the OPCW is pointing out the possibility of highly toxic chlorine gas being used in Syria's civil war.
Chlorine is widely used in daily necessities, making it difficult to classify for transfer.
But if chlorine is confirmed as having been used as a chemical weapon, there would likely be increased pressure from the international community to take action.
Jun. 29, 2014 - Updated 22:56 UTC