United Nations weapons inspectors left their Damascus hotel on Sunday morning (September 29) as they continue their fact-finding mission in Syria.

Inspectors returned to Syria on Tuesday (September 24) to continue their investigations into allegations of chemical and biological weapons use, including three previously unreported cases around Damascus in the days following the August 21 attack in Ghouta.

U.N. inspectors confirmed in a report two weeks ago that sarin was used in the Ghouta district of Damascus last month.

Western powers said the report showed Assad's forces were responsible for the attack, an accusation which Bashar al-Assad and his Russian allies have denied, pointing the blame at rebels.

The inspectors are due to complete their work in Syria on Monday (September 30) and present a full report by late October.

The day after that team completes its mission, experts from the international watchdog the Organisation for the Prohibition of Chemica