BBC News 
August 27, 2013
Russia and China have stepped up their warnings against military intervention in Syria, with Moscow saying any such action would have “catastrophic consequences” for the region.
The US and its allies are considering launching strikes on Syria in response to deadly attacks last week.
The US said there was “undeniable” proof of a chemical attack, on Monday.
UN chemical weapons inspectors are due to start a second day of investigations in the suburbs of Damascus.