UN Inspectors push for site access
24 August 2013 Last updated at 09:28 BST
The UN's top disarmament official is arriving in Syria to press the Assad regime for access to the site of an alleged chemical weapons attack.
UN inspectors have so far not been allowed to visit the suburb where large numbers of people, many of them children, are reported to have died on Wednesday.
On Friday, President Barack Obama said fresh allegations of chemical weapons use by the Syrian government this week was of "grave concern".
Catharina Moh reports.