Russian political analyst Vyacheslav Matuzov stressed that the US stance towards the crisis in Syria is \"doubled\" and cannot focus on one approach. In an interview with al-Mayadin TV channel on Wednesday, Matuzov stressed that the US Secretary of State John Kerry and his Russian counterpart Sergei Lavrov agreed on shifting the crisis into the political track while the US continues arming the opposition. He said that big amounts of weapons have been entering to the opposition in Syria and there are tens of thousands of foreign fighters fighting the Syrian army and committing crimes against the Syrian people. He pointed out that Russia has clear proofs that the chemical weapons, particularly the Sarin gas, were used in Aleppo by the terrorist groups affiliated to the opposition to drag the US and the western countries to interfere in Syria. \"All the reports from the US and the western countries on the Syrian army use of the chemical weapons are not confirmed and have no proof,\" he concluded.