Syria on 8 April 2013 rejected the proposal of United Nations to probe the reports of possible use of Chemical Weapons in the country. Ban Ki-Moon, the UN Secretary General announced on 7 April 2013 to look into the allegations of both sides of the conflict.
Syria in March 2013 asked UN to investigate the use of chemical weapons by the rebels in the village of al-Assal. Whereas, United Nations declared that it wanted to investigate all the reports related to the use of chemical weapons in Syria not only the one that the government claimed to be used by the rebels.
Syria rejected the proposal of UN because as per the rules of the country granting an access to the investigators from UN to the whole country meant violation of Syrian sovereignty but was ready to grant access to Khan al-Assal where it had reported the possible use of chemical weapons.