Russia Says Syrian Government Has 'Material Evidence' Rebels Used Chemical Weapons

United Nations report on August 21 attacks says chemical weapons were used, but does not say who used them

Syria has given Russia new "material evidence" that opposition fighters in the Syrian conflict have used chemical weapons, a Russian minister has said.

Deputy Foreign Minister Sergei Ryabkov also said a report by UN inspectors on the alleged use of chemical weapons was politicised, biased and one-sided.

He said the inspectors had only looked at evidence of an attack on 21 August, not three previous incidents.

The UN team found the nerve agent Sarin was used in the 21 August attack.