UN chemical weapons inspectors will return to Syria soon to investigate the use of chemical weapons, their chief said on Wednesday.

UN chemical weapons inspectors will return to Syria soon to investigate the use of chemical weapons, their chief said on Wednesday.

"Yes we will be returning to Syria. Our planning isn't finished yet, so I can't say when we will be going, but it will be soon," UN chief inspector Aake Sellstroem statede.

His team, which went to Syria last month, concluded in a report presented on September 16 that banned chemical weapons were used on a wide scale in Syria.

There was clear evidence sarin gas killed hundreds of people in an attack on Gouta near Damascus on August 21, the report said.

"The report that was presented was an interim report," Sellstroem said.

There were 13 or 14 accusations that "have to be investigated", he added.

A UN-mandated independent commission of inquiry into rights violations in the Syrian conflict said Monday it was investigating 14 alleged chemical weapons attacks in Syria.