The Syrian regime has handed Russia new materials implicating rebels in a chemical attack outside Damascus on August 21, Russian Deputy Foreign Minister Sergei Ryabkov said after talks in Damascus. \"The corresponding materials were handed to the Russian side. We were told that they were evidence that the rebels are implicated in the chemical attack,\" Ryabkov was quoted as saying by Russian news agencies after talks with Syrian Foreign Minister Walid al-Muallem. Ryabkov also said Russia was disappointed with a UN report into the chemical weapons attack, saying it was selective and had ignored other episodes. \"Without a full picture... we cannot describe the character of the conclusions as anything other than politicised, biased and one-sided,\" he said.