ITV News has spoken to people inside Syria who claim they have suffered the effects of chemical weapon attacks by President Bashar al-Assad's forces.
It comes as United Nations Secretary-General Ban Ki-moon renewed his request for complete access to Syria for the UN team investigating the alleged use of chemical weapons in the country.
Speaking in New York, Ban said, “A credible and comprehensive inquiry requires full access to the sites where chemical weapons are alleged to have been used. I again urge the Syrian authorities to allow the investigation to proceed without delay and without any conditions”.
Earlier today, President Barack Obama also reiterated US concerns about chemical weapons in Syria during a phone conversation with Russian President Vladimir Putin, the White House said in a statement.
The two leaders agreed to stay in touch on the issue and that Secretary of State John Kerry and Russian Foreign Minister Sergei Lavrov would continue discussions on the issue.